packet sniffer that IDs source?

From: capstan (capstan@aol.com)
Date: 12/18/02 

From: "capstan" <capstan@aol.com>
Date: Wed, 18 Dec 2002 05:33:33 GMT

Is there a packet sniffer that IDs the file or application that is the
source of IP tranmission? And this presented in an easily understood way?
Im a trying to find source of suspicious IP output from my computer.

thank you