See what programs are using the network (and likely communicating with the internet) windows 8

The same technique that was applicable for Win 7 is still available in Windows 8.

Hit Win Key + R: perfmon. Then you will see a screen like this. Here, click on ‘open resource monitor’

This will get you to a multi-tabbed interface, one of which is Networking. Click on that to see details from the windows TCP/IP stack