bandwidth by user or process id

[Patrick Kurz <kurzpatrick () ymail com>]

Dear all,
I am looking for a solution to monitor bandwidth usage
a) broken up by source and destination ip address
b) broken up by either user or process (pid) which is causing the bandwidth

I have found out how to solve a) with the pcap library.

Is it also possible to solve b) using pcap or other methods?
Is there any chance to relate a captured packet to the application/process/pid 
which has sent or received this packet? Or at least relate packets to the user 
on behalf of whom they were sent or received?

Thanks
Patrick



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