source: http://docs.buddyforms.com/article/464-metabox-visibility

buddyforms_metabox_class.php

<?php
/**
 * Function we use to add a extra class to all BuddyForms related metaboxes.
 */
function buddyforms_metabox_class($classes) {
	$classes[] = 'buddyforms-metabox';
	return $classes;
}

	/**
	 * Metabox show if form type is posts
	 */
	function buddyforms_metabox_show_if_form_type_post($classes) {
		$classes[] = 'buddyforms-metabox-show-if-form-type-post';
		return $classes;
	}

	/**
	 * Metabox show if form type is registration
	 */
	function buddyforms_metabox_show_if_form_type_registration($classes) {
		$classes[] = 'buddyforms-metabox-show-if-form-type-registration';
		return $classes;
	}

	/**
	 * Metabox show if attached page is selected
	 */
	function buddyforms_metabox_show_if_attached_page($classes) {
		$classes[] = 'buddyforms-metabox-show-if-attached-page';
		return $classes;
	}

	/**
	 * Metabox show if form post type is not none ( bf_submissions )
	 */
	function buddyforms_metabox_show_if_post_type_none($classes) {
		$classes[] = 'buddyforms-metabox-show-if-post-type-none';
		return $classes;
	}

	/**
	 * Metabox show if form post type is not none ( bf_submissions )
	 */
	function buddyforms_metabox_hide_if_form_type_register($classes) {
		$classes[] = 'buddyforms-metabox-hide-if-form-type-register';
		return $classes;
	}