query_posts by category_name and custom taxonomy

$args = array(
    'post_type' => 'post',
    'tax_query' => array(
        'relation' => 'AND',
        array(
            'taxonomy' => 'channel',
            'field'    => 'slug',
            'terms'    => array( 'news', 'comedy' ), //this is by slug
        ),
        array(
            'taxonomy' => 'category',
            'field'    => 'term_id',
            'terms'    => array( 103, 115, 206 ), //this is by id
        )
    )
);

$query = new WP_Query( $args );

That could be great if you use WP_Query than query_posts. But result are the same. WP_Query is more flexible :). Don’t forget to check more in deep about query.