user privileges for files / dirs / modules

[matthias]

Is it possible to give specific files / directories / modules specific user
privileges? We need to be able to give people access priviledges to selective
directories. Normally, one has access only to the component that he is working
on.

Our CVS repository (/cvs) is stored on a RedHat 9 machine. A group 'cvsusers'
exists. Users are working on Linux clients (command line) and Windows clients
(WinCVS).

Any help is highly appreciated.

-matt