This utility is for experienced users.

The most advanced utility in Port Explorer, Socket Spy actually gives you the ability to packet-sniff (capture and record data packets that are sent/received). Unlike conventional packet-sniffers, Socket Spy allows you to eavesdrop on individual sockets and processes so you can zero in on the sockets you want to analyse without being flooded by data from other sockets.

For a detailed example explaining how to use Socket Spy, please see Socket Spy: Packet-sniffing with Port Explorer in the Advanced section.