[rt-users] Search for field one equal to field two

[Kevin Squire]

I have an RT system running on Debian Stable (RT from the debian repo).

I would like to have that follows the logic below - but when I tried it
in the "Advance search" option, I had errors - so my guess is I am
missing something and/or don't correctly understand how things work. 
(my Perl and PostSQL skills come down to copy/paste with a bit of
guesstimating)

Is what I am thinking even possible?  Any help with pointers/reading
material will also be appreciated.

   Queue = 'HelpDesk' 
     AND LastUpdatedBy = Requestor.EmailAddress 
     AND LastUpdated > Created
 

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