Sorry to resurrect an almost 3 year old post, but did you ever find a solution? I'd like this ability myself
Not that I am aware of I'm afraid Current User (and group) is still the only available bit of information avaiulable to compare against in a run time filter. You can now partition processes up in LDSD so people can be prevented from seeing incidents that are not part of their group (for example).
If you were to riase an ER for this (if there isn't one) I'd certainly vote for it!