Monitor Users?

[Negated Void]

i've got a simple setup, apache, pure-ftpd mostly. Every user on my system (30 or so) gets access to them, and have no real restaraints on what they can do.

Is there a simple way to measure, per user, bandwith usage - especially upload? Either realtime or running total style, it's all cool.

Thanks in advance,
-Murph

[Vergo]

That might be possible using the netfilter owner match support but that's probably not the simple way you're searching, unless you find a good example somewhere.