Sorting Portfolio Items differently in different cases

I’m using a numeric custom field to sort my portfolio items on a number of pages. More specifically, these are staff profiles that need to be ordered by a custom hierarchy rather than alphabetical by slug. However, I need use these same portfolio items on another page, a directory, where I need to sort by slug alphabetically. Since I’ve edited my functions.php to sort the ‘portfolio’ post-type by the custom field numeric value, is there a way to override and sort the same portfolio items using the settings in the content item?

Here’s my code in functions.php…

// portfolio grid order using listing_order custom field
function custom_post_grid_query( $query, $params ) {
	$query['post_type'] = 'portfolio';
	$query['meta_key'] = 'listing_order';
	$query['orderby'] = 'meta_value_num';
	$query['order'] = 'ASC';
	return $query;
	}
add_filter( 'avia_post_grid_query', 'custom_post_grid_query', 10, 2);

Can I maybe apply a second custom post type to the same portfolio item? using a different sorting method? Or perhaps assign the sorting method to an id so I can differentiate by what container it’s in?

I appreciate any help.