I am currently evaluating OpenEMM for a customer interested in a newsletter management solution. This is one question I have, if you can help me it would be great

Does OpenEMM allow the assignment of User Rights directly to Mailing Lists? In other words, can I have MailingList1 available to UserGroup1 only (and not accessible in any way by UserGroup2)?
From what I have seen in the documentation, User Rights are assigned to User Actions only. I am asking this because this is an explicit requirement by our customer.
If this isn't so, has anyone developed any module that allows this functionality?
Thank you in advance...