Access control

[Jeffrey Cunningham]

I am experimenting with using Bazaar to manage a software project at 
work. Is there a way to control who has 'access rights' to the 
repository? What I would like to see is two sets of privileges: one set 
for developers who can both read and write the repository, and another 
set for users who can only read. Ideally, specific users privileges to 
read (create a branch) from the repository could be revoked if they left 
the company, for example.

Thanks for any suggestions.

-Jeff