Transferring data between macs wirelessly via router?

[myemaildw]

If you connect your Macs wirelessly through wifi will the data transfered through the router add up to my internet provider counter. I have only 10GB per month.
Does using Time Capsule wirelessly to backup my Mac with Time Machine also adds up whatever is transferred from my Mac to Time Capsule to my internet account.

 

[NAG]

If you're connecting directly to the computer and not using some sort of 3rd party service the traffic is entirely local and your ISP will not know it is happening. This goes for Time capsule backups too.