Do I miss something here?
In IEEE 802.1X-2004, there is an implicit assumption that there is only one user per port. If there is more than one user on a shared medium (as in 802.11), then a "virtual port" is created, so that this is not as restrictive as it might seem at first glance.
-- to unsubscribe send a message to radiusext-request@ops.ietf.org with the word 'unsubscribe' in a single line as the message text body. archive: <http://psg.com/lists/radiusext/>