permissions on modules

[sbrown]

Let's say I have in my repository, two modules:  client1_module,
client2_module.

I only want my internal folks to view, commit, update, etc from
client1_module.  However, I want to be able to give an employee of my
client2 access to and abilitity to commit, update, etc anything in
client2_module.

Right now, all of the files in the whole repository are owned by cvs.cvs. 
I have added all of my developers to the cvs group.  All is well.  Now,
how can I give my client2 access to ONLY her module?  I don't care if she
can see that there is another module, but I don't wan't her to be able to
view the files in, or do any updates, commits, etc on the client1 module. 
Is this possible?

Thanks.