Thanks to @robdimarco. Found something that works for MacOSX. 'SelfControl' http://visitsteve.com/work/selfcontrol/ http://visitsteve.com/work/selfcontrol/ It a

Thanks to @robdimarco. Found something that works for MacOSX. 'SelfControl' http://visitsteve.com/work/selfcontrol/ http://visitsteve.com/work/selfcontrol/ It allows you to choose specific domains to block. For the Starcraft example, blocking battle.net would be somewhat effective. Source code is on GitHub too. Now I just need something for Windows 7.