Possible to detect an/or shut off CryptoLocker by limiting total network bytes transferred?

I'm looking for a way to detect and/or limit Cryptolocker encryption by monitoring how much data is transferred (as it is encrypting files) and possibly set a quota on this transfer (QOS?).

Is such a mechanism available for a Windows machine? I haven't been able to locate this myself in default Windows settings but am open to alternative solutions.

Alternatively, such a bandwith-monitoring approach could be used to prevent a data leak, or an employee stealing company secrets.