Filter users that dont have a group assigned to them

[Anthony Palmer]

Filter users that dont have a group assigned to them

[Nic Brough -Adaptavist-]

There's no question here.

My best guess is that you aren't talking about filters, you want to find out what users aren't in groups? No way to do it in the UI of Jira (you've not said what user management you're using either - that might have something in it)