[Zope] User groups

[Etienne Labuschagne]

Hi all,

Is there a product available that would enable me to make user groups in 
Zope and assign local roles to the group, rather than the individual users.

I want to use this in a multi-party CMF portal.  I want to create a group 
for each party (be that a company, organisation, whatever) and then assign 
user, reviewer, etc. local roles to the group instead of each user.

I would be easy enough to write this so that the group object handles the 
individual user local role assignment and removal, but something a bit 
closer to the Zope security system would be preferable.

Thanks
Etienne