Multiple post type queries (with specific arguments for each)

Could you do something like this?

<?php

    $args = array(
        'post_type' => array('post','movie','actor'),
        'posts_per_page' => '20',
    );

    query_posts( $args );
    while ( have_posts() ) : the_post(); 

        global $post;

        if (($post_type == 'movie') && (get_post_meta($post->ID, 'meta_key', true) == 'your-value')) {

             // Display your content for Movie Post Type with meta value set

         } else if (($post_type == 'actor') && (get_post_meta($post->ID, 'meta_key', true) == 'your-other-value')) {     

             // Display your content for Actor Post Type and Other Meta Value

         }    

    endwhile; 

    ?> 

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