I need to delete an item attached to the Parse server

Well initially, I have a list that shows all my comments, which is my problem.

I want only the owner of the photo to be able to delete the comments that are in the photo.

Someone has some idea.

here's my code:

public void deleteComment () {

    listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
        @Override
        public void onItemClick(AdapterView<?> parent, final View view, final int position, long id) {


            view.setSelected(true);
            listView.setBackgroundResource(0);
            view.setBackgroundResource(R.color.accent_material_light);

            in = position;




            AlertDialog.Builder dialog = new AlertDialog.Builder(ComentarActivity.this);

            dialog.setTitle( "Deletar" );
            dialog.setMessage( "Tem certeza, que deseja apagar este comentario?" );

            dialog.setCancelable( false );

            dialog.setNegativeButton( "Não",
                    new DialogInterface.OnClickListener() {
                        @Override
                        public void onClick(DialogInterface dialogInterface, int which) {

                            excluir();

                        }
                    } );

            dialog.setPositiveButton( "Sim",
                    new DialogInterface.OnClickListener() {
                        @Override
                        public void onClick(DialogInterface dialogInterface, int i) {



                            mostrarUM.remove(in);


                            ArrayAdapter adapter = new ArrayAdapter(
                                    ComentarActivity.this,
                                    android.R.layout.simple_list_item_1,
                                    mostrarUM);

                            listView.setAdapter(adapter);

                        }

                    } );
            dialog.create();
            dialog.show();