Notes/Domino 4 and 5 Forum

Hello All
I need to be able to hide some buttons based on what is in a field. No problem there, However this form was modified and the field (Approver_4)may or may not contain a Username, it may also contain group names.
I want to be able to hide the buttons to all except 1)the person named in the field
2) the group name in the field(Roles)

Here is what I have so far.

I can get it to show if the group is in the field and the right Role is assigned to a group, but if there is a name in the field I cannot get the button to show only to that person.

@TextToNumber(MaximumApprovers) < 5 | StatusRev != "Complete" | StatusD != "Drafting Complete"|

(@IsNotMember("[AE1]"; @UserRoles) & @Contains(approver_4 ; "Assembly-Engine")) :
(@IsNotMember("[AR1]"; @UserRoles) & @Contains(approver_4 ; "Assembly-Rotor")) :
(@IsNotMember("[FC1]"; @UserRoles) & @Contains(approver_4 ; "Forming-Components-1")) :
(@IsNotMember("[FC2]"; @UserRoles) & @Contains(approver_4 ; "Forming-Components-2")) :
(@IsNotMember("[FC3]"; @UserRoles) & @Contains(approver_4 ; "Forming-Combustion")) :
(@IsNotMember("[FD1]"; @UserRoles) & @Contains(approver_4 ; "Forming-Details-1")) :
(@IsNotMember("[FD2]"; @UserRoles) & @Contains(approver_4 ; "Forming-Diaphragms-2")) :
(@IsNotMember("[FB1]"; @UserRoles) & @Contains(approver_4 ; "Forming-Blades&Vanes")) &

(approver_4 != CurrentAuthor)

| AppStat_4 = "Approval Completed"


TIA

James