search by taxonomie
query_posts( array( 'post_type' => 'myportfoliotype', 'paged' => $paged, 'posts_per_page' => 80,
'tax_query' => array(
array(
'taxonomy' => 'categories', //or tag or custom taxonomy
'field' => 'id',
'terms' => array('9', '13')
)
)
));