Yes, RDup could be eliminated. I didn't remove it for the sake of reusability.

my %unique;
foreach $d (@dllExeLines) {        
   if ($d =~ /\Q$serviceName/) {
      foreach $f (split(/,/, $d)) {
         if ($f =~ /\Q$dll/i) {
            $unique{lc($dll)} = $dll;
         }
      }
   }
}

my @unique = sort values %unique;
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