Gameplay tag query for "not my team" when the team changes at run time

From what I understand the Get All Actors of Class Matching Tag Query node is not functional in BP (and I assumed that extends to the EQS test) however when it does get there…

Is there any way to make a query that can handle tags not known until run time?

Specifically, say I have

Team
    .Red
    .Blue
    .Purple
    .Green

And an AI can be on any or all of the teams. Is there a way, or will there be a way, to say ALL(Team, NONE([my teams]))

This is not causing problems for me right now because I am just comparing the containers, however it would be nice to know how something like this might be done in the future - especially regarding the EQS test.