Group permissions to branches

[Danial]

Hi, I'm a newbie to CVS and in my repository I have set up a main
trunk with two branches coming out of it, e.g.  Branch A and Branch B.
  Is it possible to restrict Branch A to a certain group of users, and
Branch B to another group of users?  How would this be done in UNIX?

How would I modify the CVSROOT/passwd file to accomodate this? Right
now my passwd file uses their UNIX IDs and passwords.

Any help would really, really be appreciated!


Danial.