tcpdump & process information

[Edward]

Hi there!

Is there an utility which can work as usual tcpdump but with process 
information option?
(or something like continually running `sockstat -46` or `fstat | grep 
internet` or `lsof -i4 -i6` ...etc)
i.e. i wanna see which process generate network traffic to trace out 
some suspicious activity.
it would be great if this program will be might to log all what it`ll 
capture.