Based on what I am reading here in HTML::Template Tutorial under Example 3, I think you are going to need to ensure that you are not getting duplicates while generating the array of hashes that gets passed to the loop. I don't see how the TMPL_LOOP combined with a conditional would allow you to do this in the template itself.
in reply to TMPL LOOP question
I could of course be wrong, and would be happy to have anyone point it out if I am.
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