To filter an array one usually uses grep. You have to dereference the inner arrays to get to their members:

#!/usr/bin/perl
use warnings;
use strict;

use Data::Dumper;

my @array = ([ 1,  2,  3],
             [10, 10, 10],
             [ 1,  1,  5]);

my @nonequal = grep $_->[0] != $_->[1]
                    ||
                    $_->[2] != $_->[0],
               @array;

print Dumper \@nonequal;
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