If your users have static computer IP addresses you can achieve that with application control rules. Look at my example for Facebook in attached screenshot.
- I configured exactly the application control rules as your attached screenshot: + created 4 rules (2 for facebook, 2 for Skype); + created Network group + added Host to Network Group by Computer IP Address => Skype & Facebook still not able to access.
- In case Socks is enabled, the configuration describe as below: + Allow Networks (10.9.1.0/24) + Enable user Authentication + on Client PC, configure Skype proxy with Socks and authentication user => skype still not work.
Please advise if I configured something wrong here. Thank you so much