is it possible to block users access to internet using tethering ?

[sanjay mehta 6]

after finding users who circumvent the corporate network limitations by getting direct access to internet using tethering on their mobile phones, a need is felt to block the tethering internet access.

from what i know, blocking USB will block USB tethering access but selective blocking of only internet access thru USB tethering is not possible. ditto for bluetooth tethering.

but then there is wifi tethering which presents even more problem, because we would not want to disable wifi on a device.

[Marcos 5,468]

Currently Device Control doesn't support USB tethering.