For example in a Car Rental System where the car owner should have his admin interface to view, add and delete his cars and also view orders orders, pending payments, finished payments but he should not have access to other car_owners' admin interfaces. He also should not have access to the actual admin interface where all app permissions are accessed.
I have tried to use django user authentication system filter permissions using is_superuser and is_admin but I can seem to get where I want. I have never done this before and I can't seem to get an answer on the internet. Most of these django developers use a single adminstation system.