Monitor data (internet) usage

Question

Is there a way to monitor how much data(internet) each application used?

If I cannot monitor applications is there a way to get all internet requests information? (get data passed, url, etc)

(I would like to use this info in an app Im developing for iphone)

Answer 1

No, you only have access to your own application's sandbox, and therefore can only track the network usage of your own application.