Since Codebeamer release 2.0, the private views and the shared private views are separated both on tracker views and on the reference selector overlay.

User A's own private views are saved in the My Private Views folder, while the private views created by others and shared with the user A are saved in the Shared Private Views folder.

Private views and shared private views are separated to see who created a specific view and who that view is shared with. A user whom a private view is shared with cannot edit or delete that view without writing permission for that view.