Online Armor's firewall is designed to be easy to use, right out of the box - but that doesn't mean it lacks in power. Slip into advanced mode, and additional options for power users (or helpful techs setting up the firewall for mum) are present.
Import blacklists from bluetak directly into the firewall and apply them against rules. This allows protection of P2P programs or web browsers, without applying these lists against every connection. You can also use this feature to block countries or networks known to host malware, zombies or other dangerous content.
If you want to limit the connectivity of your computer to known systems (for example, VNC to your home computer from the office network only) you can restrict it in Online Armor easily. You can also restrict connections by country ("Don't allow connections to this country") or, alternatively, only open up certain countries ("Only allow my browser to connect to sites in the USA or Australia").