pp \@aoa;;
[
  ["922337219576856 ", "rgiles   ", "5005444 ", "156 ", "pts/220 ", "9:00:44"],
  ["922337219576856 ", "mrandall ", "3309650 ", "35  ", "none    ", "9:10:44"],
  ["922337219576856 ", "mmartin  ", "4565899 ", "122 ", "pts/101 ", "9:15:44"],
  ["59761456123786  ", "rkelly   ", "5555555 ", "999 ", "pts/900 ", "9:00:00"],
  ["59761456123786  ", "mvick    ", "1234567 ", "886 ", "none    ", "9:20:00"],
  ["59761456123786  ", "jrussel  ", "7654321 ", "456 ", "tty/101 ", "10:00:00"],
  ["86555522211     ", "cklien   ", "5151515 ", "000 ", "tty/100 ", "10:00:00"],
  ["86555522211     ", "mmartin  ", "1234567 ", "987 ", "none    ", "11:00:00"],
]

$excluded = 'mmartin';;

@new = grep $_->[1] !~ $excluded, @aoa;;

pp\@new;;
[
  ["922337219576856 ", "rgiles   ", "5005444 ", "156 ", "pts/220 ", "9:00:44"],
  ["922337219576856 ", "mrandall ", "3309650 ", "35  ", "none    ", "9:10:44"],
  ["59761456123786  ", "rkelly   ", "5555555 ", "999 ", "pts/900 ", "9:00:00"],
  ["59761456123786  ", "mvick    ", "1234567 ", "886 ", "none    ", "9:20:00"],
  ["59761456123786  ", "jrussel  ", "7654321 ", "456 ", "tty/101 ", "10:00:00"],
  ["86555522211     ", "cklien   ", "5151515 ", "000 ", "tty/100 ", "10:00:00"],
]