will --cmd-owner ever return?

[vwf <vwf@vulkor.net>]

Hello,

Since kernel 2.6.15, command owner matching is gone (-m owner
--cmd-owner). I consider this match vital for securing a workstation.
Programs are calling home (including well known very free source ones),
emails contain all kinds of tricks to report back (some of them I cannot
delete unseen), some programs are simply too insecure to be alowed to
connect to some server (e.g. media players), and often I simply want my
workstation to be absolutely quiet (except when I specificly ask for
something).

How can I lock my workstation down on application level?
Please tell me Netfilter can do this. Or can't it?