APM 11.3 client side registry check - Case sensitivity issue

Sadly I don't believe there is a way. The actual processing is handled by a client side control that simply replies with something like this (encoded):

result=1&extended_result=Policy%20verification%20succeeded

The control does not return a value other than the result code.

It is a fantastic idea though. If you get a chance, please open a support case to raise (hopefully existing) awareness of this requirement.