Without knowing your current configuration, it's extremely hard to give a step by step guide. If you can send the following information from your WinGate to either Nev's or my own email address, one of us can then use this information to give you a guide to setup this policy on top of what you already have configured.
Alternatively, you might be better off contacting the Qbik Support helpdesk with the following information directly if you want a faster solution for your question.
http://support.qbik.com/index.php
1. WinGate Registry.
GateKeeper --> Options menu --> Advanced --> Save Registry
2. WinGate Config Report
GateKeeper --> Options menu --> Advanced --> Save Config Report
3. ipconfig/all from one LAN Client, and the WinGate Server
(Windows) Start menu --> Run --> cmd --> ipconfig/all >> C:\ipa.txt