#!/usr/bin/perl -w
use strict;

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 @terms = $line =~ /\(.*?\)/g;
foreach (@terms)
{
   s/.*(\(.*\)).*/$1/;
   s/^\(\s*//;
   s/\s*\)$//;
   print "$_\n";
}
__END__
Prints:
my.my id >= 1
is-relative.to code = 'sister'
is-relative.to code = 'brother'
is-mother.to code = 'dog'