Grandfather meant \Q..\E, not \Q..\Q.

if ($line =~ m/\Q$process\E/i) {
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That checks if $process is in $line. You could also use index, which might even be faster.

if (index(lc($line), lc($process)) >= 0)) {
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If you wanted to check if the two vars are the same, then that should be

if ($line =~ m/^\Q$process\E\z/i) {
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or

if (lc($line) eq lc($process)) {
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