One of the best place to learn how to leverage web operations is by looking at HTMPL page in the TAB sections.
As an example, in detail_cnt when you display the list of group a contact is a member of :
<PDM_MACRO name=tab title="Groupes" height=300 id=cnt_grp src="OP=SEARCH+FACTORY=cnt+QBE.EQ.member_list.member.id=$dob.id+KEEP.type.id=2308+KEEP.forCntToGrp=1+KEEP.CNT_PERSID=$args.persistent_id+KEEP.CNT_ID=$args.id">
By looking at this you can create an URL to get all the ticket for wich a user is a member :
?OP=SEARCH+FACTORY=cr+QBE.EQ.group.member_list.member.userid=myUserID
And an URL to get all the Resolved ticket that belong to a group in wich a contact is a member
?OP=SEARCH+FACTORY=cr+QBE.EQ.group.member_list.member.userid=myUserID+QBE.EQ.status=RE
Hope this helps.