On the OmniROM website, I saw that the OmniSwitch feature would only work for Android 4.4.x.
Having a long history of backporting apps and other features, I decided to have a go at this too. So here it is, OmniSnitch, a completely backported version of OmniSwitch. This has been backported to ICS and with a few changes will work on HoneyComb too. But having 0.1% of the android market, I'm not going to be supporting it.
(Same as OmniSwitch)
Downloads at end of third post.