Processes do not have 'names' per se. The process consists of whatever program + arguments it was invoked with. As mentioned by 'sacked', what Proc::ProcessTable returns is OS dependent. To find out all the fields available from Proc::ProcessTable and what values the current processes have for those fields, try:

use strict;
use warnings;

use Proc::ProcessTable;

my $t = Proc::ProcessTable->new;
my fields = $t->fields();

foreach my $p (@{$t->table}) {
  foreach my $f (@fields) {
    print $f, ': ', $p->$f, "\n";
  }
  print "----------\n";
}
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That will give you everything you can potentially work with.