Unless I'm missing your point. Sorting an array of hashes by the values of multiple keys is easy: 
my @l=( {FN=>'Les',LN=>'Howard'},
        {FN=>'Larry',LN=>'Wall'},
        {FN=>'Randal',LN=>'Schwartz'});

foreach(sort {$$a{LN} cmp $$b{LN} or $$a{FN} cmp $$b{FN}} @l){
  print "$$_{LN}, $$_{FN}\n";
}

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The above code sorts a lits of hashes (each hash containing first and last names) by last name and then first name. The order of the original @l is not altered.

In reply to RE: Sort Array of Hashes by values of multiple hash keys. by lhoward
in thread Sort Array of Hashes by values of multiple hash keys. by raflach

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