Hello,
its not possible .
for other WJ members who didn't understand what he meant:
the user can't connect to internet without setting up a http proxy in his browser. so basically he can connect to http and https protocol only.
and since VPN don't use both of those protocols its not possible unfortunately.
currently I'm working on implementing something that could help in such situation but it will require the end user to edit his hosts file to IP that I can provide.
technically it will bypass any protection including ISP proxy filtering.
Highest Regards
Mohammed H