[Feature request] Ask/block on a per-hostname/domain basis

[ThreeDeeJay]

What would you like to add or change?:
It would be super useful to be able to allow only specific domains/hostnames for apps that I give internet access to, so we can reduce the hassle of having to whitelist multiple IPs belonging to the same hostname/server/entity, especially if it supports wildcards like Rethink DNS (Android only) or Acryllic DNS (Windows, but only supports global blocking) and more importantly, knowing who the IPs actually belong to at a glance.

Why do you and others need this?:
We all have probably encountered an app that expects internet access to work, but that we do not fully trust.
Like I wouldn't mind an app connecting to GitHub servers to download/check for updates, but I do have an issue with apps attempting to phone home, or worse.

[github-actions]

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