Just use grep: 
foreach my $line (@file1) {
    if (my @matched = grep {$line =~ /\Q$_\E/i} @users) {
        print "YES @matched is on $line \n";
    } else {
        print "nope...\n";
    }
}

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In reply to Re: Reconcile one list against another by wind
in thread Reconcile one list against another by spartan

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