Work Order Tracking Advanced Search has the Related WO field
That generates SQL:
((woclass = 'WORKORDER' or woclass = 'ACTIVITY') and historyflag = 0 and siteid = 'BEDFORD' and istask = 0) and (exists (select 1 from dbo.relatedrecord where ((emxrelatedwonum like '%
12345678%')) and (siteid = workorder.siteid and recordkey=workorder.wonum and class =workorder.woclass and relatedrecclass in (select value from synonymdomain where domainid ='WOCLASS' and maxvalue in ('CHANGE', 'RELEASE','ACTIVITY', 'WORKORDER')))))
Person Group does not come on the advanced search out of the box, so you will need to add it, and then your users can just use the screen and not have to deal wtih the SQL