Can anyone explain for me how the permissions works i OS X (Unix).
I have used Both Appleshare IP and WinNT as fileservers and in NT the permissions are really nice. Its possible to give a file or folders many different permissions. There is no stop for how many different groups i can add to the file/folder. As i can see in OS X and other Unix system i can only give preileges to Owner, Memeber and Everyone.
With only this options i cant see how it will be possible to build a complex folder system with many groups and users.

Will be very happy for answers and suggestions.