Restricted Multi-Domain Tags

[Thalamus]

I am missing a Snippet Type which let me define a set of Domains that can be assigned. Like the Tags (Multi-Domain), but with the Restricted Feature of the Tags for multiple Domains.

One concrete Usecase is the Spelllevel. I want to define a snippet inside the Spell definition where I can select the Spelllevel for each Class.

Then I would have multiple Spelllevel Domains like: Spelllevel (Wizard), Spelllevel (Sorcerer) etc.