First, you need pcap from The WinPcap Website. This does not include the Net::Pcap module, but it is the origin of pcap for Win32. You also need Net::PcapUtils. Unfortunately, I have not seen the compiled .xs file for Net::Pcap for Win32. It might compile straightaway, but I don't have a C compiler for my Win32 systems. Maybe some kind Win32-savvy monk could build and test it.

HTH, --traveler

Update: You might also try the winpacp mailing list. See http://winpcap.polito.it/contact.htm.

Update2: I think I have located the compiled Net::Pcap and have e-mailed the author. I am not sure about its current status...More info when I get it