Finding active connections to postmaster

I want to list which users are conected to postmaster and what
they are doing. I guess I have overseen something but I wasn't
able to find any information on doing this in the handbook, FAQ
or mailinglist archives.

Is it possible to list active connectons? How?

drt

--
"Before the Internet, a certain breed of deconstructionists had a lot of fun
telling everybody that "privileging of dominant paradigms" was wrecking the
world. The Internet has taught us that privileging certain views is
absolutely crucial to avoid drowning in the ravings of idiots." -Keunwoo Lee