Program may only use OpenVPN

Hi,

I have a program which is only allowd to use OpenVPN.

In Program Control for that program I add a rule above the other rules:

Block --- From and to other computers --- Only computer and sites shown below: My IP address -- block all communication --- etc.

I translated it from Dutch.

The solution looks logic to me.

If the program uses OpenVPN (not my IP) the program should work; if OpenVPN is disabled (showing my IP) the program should be blocked.

For some reason this doesn't work.

NIS 2011 and Windows 7.

Thanks.