The use case is pretty easy: you have internet connected devices like TVs, lightbulbs and what the heck else you can have on your network. You want to block every internet connection besides those which are required that these devices can operate.
So it would be nice to:
- create groups of devices like all your lightbulps, all your tablets, all your TVs, whatever
- disable all traffic by default for these devices or device groups
- only allow traffic to specific domains for those devices
As far as I understood how pi-hole works today this is a pretty tough request as either all or none is possible when it comes to blocking.
If it helps to understand my use-case better, see: