use feature ":5.10";
use strict;
use warnings;

my $line = "05/04/2010 13:09:45 - A - somebody - ( ( my.my id >= 1 ) ) and ( ( is-relative.to code = 'sister' ) or ( is-relative.to code = 'brother' ) or ( is-mother.to code = 'dog' ) )";
my $open = 0;
my @result = ('');

for my $char (split ('',$line)) {
    given ($char) {
        when ('(') {
            $open++
        }
        when (')') {
            $open--;
            push @result,''
        }
        default {
            $result[-1] .= $char if $open
        }
    }
}