Some detective work on your network connections

[MyWorld]

http://www.commandlinefu.com/commands/view/3543/show-apps-that-use-internet-connection-at-the-moment.

Very handy tips and trick in this site, have a look and educate your network.

 

[kingrob]

Thanks MyWorld, will definitely have a look at the article!

 

[GreGorGy]

Some work on OS X as well.

 

[BigAl-sa]

If you use Firestarter, you can just click on active connections