If you don't already know, we have been updating the our parsers for Network Monitor on http://www.CodePlex.com/NMParsers every month. Most recently we have updated the Windows parser set to support Windows 7 protocol updates. In the June parser release on CodePlex we have support for Remote Windows Sockets (RWS) protocol, which is used to proxy TCP and UDP traffic from Winsock applications. So now with the new parser set you can decode this traffic into the upper level protocols that ride on top of RWS.
These parsers rely on Network Monitor 3.3, so please upgrade first if you haven't already. Please visit NMParsers on CodePlex and download the last parser set so you can get the most up to date parsing experience. Enjoy!