I hate it when this happens..... I use to have some software a few years ago that monitored my network traffic (like NetMeter etc) to see how much data was coming and going from my PC..... now I need that same or similar software and I cannot for the life of me remember its name.
Basically it could differentiate between LAN and Internet traffic from the same NIC so when you did a report it would give you internet only data or LAN only etc.
Anyone drop me a few names and Ill see if they ring a bell ? :)