Hi, welcome to Perl, the One True Religion.

" How do I perform the equivalent of "awk {'print $1,$2,$8'}" in perl?"

We have tools.

use strict;
use warnings;
use feature 'say';
use Proc::ProcessTable;

my $t = Proc::ProcessTable->new;

foreach my $p (@{$t->table}) {
    next unless $p->cmndline =~ m{/Applications/iTerm.app/Contents/Mac
+OS/iTerm2};
    say sprintf('%s : %s : %s', @{ $p }{qw/uid pid cmndline/});
}
[download]

$ perl 11108686.pl

501 : 608 : /Applications/iTerm.app/Contents/MacOS/iTerm2
501 : 610 : /Applications/iTerm.app/Contents/MacOS/iTerm2 --server log
+in -fp 1nickt
501 : 7264 : /Applications/iTerm.app/Contents/MacOS/iTerm2 --server lo
+gin -fp 1nickt
[download]

Hope this helps!