Currently we can do JQL commands like "assignee in membersOf(groupName) but there's no way of doing the opposite,  I.E. customGroupPickerValue in groupsOf(assignee)

Use-case: when setting up a service desk under a single project to manage issues via Group Ownership, it'd be useful to create a "my tickets" queue which could show tickets that are assigned to the currentUser as well as unassigned tickets that are assigned to the user's group within a single queue.  That way they could see quickly all the work available to them without having to browse through multiple queues (especially if they are in multiple groups)