Comment 5 for bug 820895

nethogs and netstat can connect pids to program names, so in theory someone could add this functionality to iptables. You could also setup a cron job to regularly log netstat output for all network connections to a file. For example, the following command ran as root will timestamp and log all network connections every 5 seconds to log.txt:
   # while [ 1 == 1 ]; do date >> log.txt; netstat -pn -A inet --wide >> log.txt; sleep 5 ; done
You can run without root privledge, however process you don't own won't be included. Hope this helps a little.