Recently the new version of Microsoft network sniffer tool Netmon gone live. 

What's new in version 3 of Netmon?

• A completely new user interface
• Real time capture and display of frames
• Simultaneous capture on multiple network adapters
• Multiple simultaneous capture sessions
• Network conversations and a tree view displaying frames by conversation
• A new script-based protocol parser language, and script-based parsers
• Support for Vista/Windows XP/Windows Server 2003
• Support for 32bit and 64bit platforms

 This essentially means you can create filters by yourself, and see real life what's happening on your network interface. You can get it for free at connect.microsoft.com