diff --git a/app/Exports/StudentsExport.php b/app/Exports/StudentsExport.php
index 6a8d846..01b7085 100644
--- a/app/Exports/StudentsExport.php
+++ b/app/Exports/StudentsExport.php
@@ -18,6 +18,7 @@ class StudentsExport implements FromCollection, ShouldAutoSize, WithEvents, With
     use StyledHeadingRow;
 
     public function __construct(
+        private readonly User $user,
         private readonly string $search = '',
         private readonly ?string $gender = null,
         private readonly ?int $departmentId = null,
@@ -32,7 +33,7 @@ public function title(): string
 
     public function collection(): Enumerable
     {
-        return app(StudentService::class)->forExport($this->search, $this->gender, $this->departmentId, $this->status, $this->enrollmentYear);
+        return app(StudentService::class)->forExport($this->user, $this->search, $this->gender, $this->departmentId, $this->status, $this->enrollmentYear);
     }
 
     public function headings(): array
diff --git a/app/Http/Controllers/Admin/Users/StudentController.php b/app/Http/Controllers/Admin/Users/StudentController.php
index 17e4c4a..5cff4a1 100644
--- a/app/Http/Controllers/Admin/Users/StudentController.php
+++ b/app/Http/Controllers/Admin/Users/StudentController.php
@@ -31,6 +31,7 @@ public function index(PaginatedRequest $request): Response
     {
         return Inertia::render('admin/users/students/index', [
             'students' => $this->service->paginated(
+                $request->user(),
                 ...$request->validatedWithDefaults(),
                 gender: $request->validated('gender'),
                 departmentId: $request->validated('department_id'),
@@ -112,6 +113,7 @@ public function updateUserStatus(UpdateStatusRequest $request, User $user): Redi
     public function export(PaginatedRequest $request): BinaryFileResponse
     {
         return Excel::download(new StudentsExport(
+            user: $request->user(),
             search: $request->validated('search') ?? '',
             gender: $request->validated('gender'),
             departmentId: $request->validated('department_id'),
diff --git a/app/Services/Admin/Users/StudentService.php b/app/Services/Admin/Users/StudentService.php
index 4f0acff..5cbb9d6 100644
--- a/app/Services/Admin/Users/StudentService.php
+++ b/app/Services/Admin/Users/StudentService.php
@@ -14,9 +14,9 @@
 
 class StudentService
 {
-    public function paginated(int $perPage = 25, string $search = '', ?string $gender = null, ?int $departmentId = null, ?string $status = null, ?int $enrollmentYear = null): LengthAwarePaginator
+    public function paginated(User $user, int $perPage = 25, string $search = '', ?string $gender = null, ?int $departmentId = null, ?string $status = null, ?int $enrollmentYear = null): LengthAwarePaginator
     {
-        return $this->filteredQuery($search, $gender, $departmentId, $status, $enrollmentYear)
+        return $this->filteredQuery($user, $search, $gender, $departmentId, $status, $enrollmentYear)
             ->latest()
             ->paginate($perPage, ['id', 'username', 'email', 'is_active']);
     }
@@ -109,9 +109,9 @@ public function updateUserStatus(User $user, bool $isActive): void
         $user->update(['is_active' => $isActive]);
     }
 
-    public function forExport(string $search = '', ?string $gender = null, ?int $departmentId = null, ?string $status = null, ?int $enrollmentYear = null): Collection
+    public function forExport(User $user, string $search = '', ?string $gender = null, ?int $departmentId = null, ?string $status = null, ?int $enrollmentYear = null): Collection
     {
-        return $this->filteredQuery($search, $gender, $departmentId, $status, $enrollmentYear)
+        return $this->filteredQuery($user, $search, $gender, $departmentId, $status, $enrollmentYear)
             ->orderBy('created_at', 'desc')
             ->get(['id', 'username', 'email', 'is_active']);
     }
@@ -142,14 +142,19 @@ public function getEnrollmentYears(): array
             ->all();
     }
 
-    private function filteredQuery(string $search, ?string $gender, ?int $departmentId, ?string $status, ?int $enrollmentYear = null): Builder
+    private function filteredQuery(User $user, string $search, ?string $gender, ?int $departmentId, ?string $status, ?int $enrollmentYear = null): Builder
     {
+        $taughtDepartmentIds = $user->hasRole(UserRole::Dosen->value)
+            ? $user->lecturer?->departments()->pluck('departments.id')->all() ?? []
+            : null;
+
         return User::with([
             'profile:id,user_id,full_name,phone_number,gender,birth_place,birth_date,address',
             'student:id,user_id,student_number,department_id,enrollment_year,current_semester,status',
             'student.department:id,name',
         ])
             ->whereHas('roles', fn ($q) => $q->where('name', UserRole::Mahasiswa->value))
+            ->when($taughtDepartmentIds !== null, fn ($q) => $q->whereHas('student', fn ($q) => $q->whereIn('department_id', $taughtDepartmentIds)))
             ->when($search, fn ($q) => $q->where(function ($query) use ($search) {
                 $query->where('username', 'like', "%{$search}%")
                     ->orWhere('email', 'like', "%{$search}%")