my $criteria = 3;
my @sorted = sort { (split /\|\|/, $hash{$a} )[$criteria] cmp
                    (split /\|\|/, $hash{$b} )[$criteria] } keys %hash;

##</code><code>##

my @criteria = (0, 2);
my @sorted = map { $_->[0] } sort { $a->[1] cmp $b->[1] }
             map { [ $_, join( "", ( split /\|\|/, $hash{$_} )[@sorted] ] }
             keys %hash;