Community Events 1.0.5 (force author)

function setup_force_community_author() {
    add_action('save_post', 'force_community_author');
}

function force_community_author($postID) {
    // Clear action: this should only run once
    remove_action('save_post', 'force_community_author');

    if (!isset($_POST['community-event'])) return;
    if (!check_admin_referer('ecp_event_submission')) return;

    wp_update_post(array(
        'ID' => $postID,
        'post_author' => 2 // Change to the ID of the desired author
    ));
}

add_action('tribe_ce_before_event_submission_page', 'setup_force_community_author');