I know it is possible to link customers to groups via query result but cannot fully remember how I was shown.
I shall try to explain what it is I'm trying to achieve.
We have an attribute on each of our end users called trust, and customer groups each with the same name as the trust attributes which I'm trying to match. from what I remember when I was shown how this works, a query was written to bring back all users with a given trust and then results of this query were dragged onto the desired customer group to populate the customer group with the returned users.
Sorry if my explaination does not make sense and thanks for any help that anyone is able to provide.