I interpreted your question to mean that subscribers on the USERS list should
be able to post to the other lists, but that there are no other cross-posting
requirements. If that is the case, use the following configurations:

USERS list configuration:
        Send= Private

ADMINISTRATORS, DEANS, and DIRECTORS list configurations:
        Send= Private,(USERS)

--
Paul Russell
Senior Systems Administrator
OIT Messaging Services Team
University of Notre Dame