qr|
  $owner        # proc owner
  \s+           # one or more whitespace
  (\d+)         # capture one or more digits
  .*            # everything up until...
  \s+           # the last whitespace
  $processName  # proc name
  $             # end of string
|x
##</code><code>##

use warnings;
use strict;
use feature 'say';

getPids('top', 'ubuntu');

sub getPids{
    my ($processName,$owner) = @_;
    my $ps;
    my $pid;
    my $command = "/bin/ps auwwwx | grep $processName | grep -v grep | grep -v 'sh -c' ";

    $ps = `$command`;

    # print $ps;

    my @lines = split( "\n",$ps);

    # print @lines;

    foreach my $line (@lines){
        if ($line =~ qr|$owner\s+(\d+).*\s+$processName$|){
            say "Found $processName in getPids() owned by $owner. PID is $1";
        }else{
            say "Loser";
        }
    }
}

##</code><code>##

Found top in getPids() owned by ubuntu. PID is 9377

# orig:
ubuntu    9377  0.0  0.1  23668  1600 pts/2    S+   18:23   0:00 top