Microsoft Network Monitor
Usage Video: http://www.youtube.com/watch?v=AvgMGk1trio
One of the best network analysis utilities on Windows.
You can choose any Physical/Virtual NIC present on your machine to capture traffic.
It shows the traffic in a nested tree menu ordered by Application Name generating that traffic.
This way you can analyse entire network traffic per application from your machine.
Tool to allow capturing and protocol analysis of network traffic.
It's free, it's fine network packets analysis utility.
It also allows you to save captured data into PCAP files, and can even open and analyze PCAP files.
Download Link & Installation:
How To Capture Network Traffic: