要为同一帖子类型显示不同的模板，我需要创建两个不同的链接，检查我当前所在的链接，并决定加载哪个模板。

工作示例：

/**
 * Register event post type
 *
 * Registering event post type will add such a permalink structure event/([^/]+)/?$
 */
function wpse_288345_register_event_post_type() {

    $labels = array(
        \'name\' => __( \'Events\' ),
        \'singular_name\' => __( \'Event\' ),
        \'add_new\' => __( \'Add new\' ),
        \'add_new_item\' => __( \'Add new\' ),
        \'edit_item\' => __( \'Edit\' ),
        \'new_item\' => __( \'New\' ),
        \'view_item\' => __( \'View\' ),
        \'search_items\' => __( \'Search\' ),
        \'not_found\' => __( \'Not found\' ),
        \'not_found_in_trash\' => __( \'Not found Events in trash\' ),
        \'parent_item_colon\' => __( \'Parent\' ),
        \'menu_name\' => __( \'Events\' ),

    );

    $args = array(
        \'labels\' => $labels,
        \'hierarchical\' => false,
        \'supports\' => array( \'title\', \'page-attributes\' ),
        \'taxonomies\' => array(),
        \'public\' => true,
        \'show_ui\' => true,
        \'show_in_menu\' => true,
        \'show_in_nav_menus\' => false,
        \'publicly_queryable\' => true,
        \'exclude_from_search\' => false,
        \'has_archive\' => true,
        \'query_var\' => true,
        \'can_export\' => true,
        \'rewrite\' => array(\'slug\' => \'event\'),
        \'capability_type\' => \'post\',
    );

    register_post_type( \'event\', $args );
}

add_action( \'init\', \'wpse_288345_register_event_post_type\' );

/**
 * Add custom rewrite rule for event post type.
 *
 * Remember to flush rewrite rules to apply changes.
 */
function wpse_288345_add_event_rewrite_rules() {

    /**
     * Custom rewrite rules for one post type.
     * 
     * We wil know on which url we are by $_GET parameters \'performers\' and \'summary\'. Which we will add to
     * public query vars to obtain them in convinient way.
     */
    add_rewrite_rule(\'event/performers/([^/]+)/?$\', \'index.php?post_type=event&name=$matches[1]&performers=1\', \'top\');
    add_rewrite_rule(\'event/summary/([^/]+)/?$\', \'index.php?post_type=event&name=$matches[1]&summary=1\', \'top\');
}

add_action(\'init\', \'wpse_288345_add_event_rewrite_rules\');

/**
 * Add \'performers\' and \'summary\' custom event query vars.
 */
function wpse_288345_register_event_query_vars( $vars ) {

    $vars[] = \'performers\';
    $vars[] = \'summary\';

    return $vars;
}

add_filter( \'query_vars\', \'wpse_288345_register_event_query_vars\' );

/**
 * Decide which template to load
 */
function wpse_288345_load_performers_or_summary_template( $template ) {

    // Get public query vars
    $performers = (int) get_query_var( \'performers\', 0 );
    $summary    = (int) get_query_var( \'summary\', 0 );

    // If performer = 1 then we are on event/performers link
    if( $performers === 1 ) {
        $template = locate_template( array( \'single-event-performers.php\' ) );
    }

    // If summary = 1 then we are on event/summary link
    if( $summary === 1 ) {
        $template = locate_template( array( \'single-event-summary.php\' ) );
    }

    if($template == \'\') {
        throw new \\Exception(\'No template found\');
    }

    return $template;
}

add_filter( \'template_include\', \'wpse_288345_load_performers_or_summary_template\' );