"user
created distribution lists" (check if there's an RFE open...)
There's two different sides to this that you need to be aware of in your request:
A) Personal-different than pulling all contacts from an address book and making a contact groups, this would be an actual address that could recieve replies
B) Global-so others can subscribe to this user created list
(both perhaps tagged with the user's address to know who the list owner is)
Half way to step B is "user
subscribed distribution lists":
ie: to join another list they send a mail to
listname@domain.com
subject or body: subscribe/unsubscribe etc
OR
They get a tab in options that shows the distribution lists their on, helps them to subscribe, and possibly shows system wide lists to subscribe to.
This was the 'member of tab' for the admin console-you could make a new RFE for the user side tab
Bug 7366 - need to add a "Member Of" tab to admin console
to sum up there's not a whole lot of ACL's in place for that yet, it'll get there eventually, different levels of permissions are slowly being defined...it's just a lot to code...