Sort [s2Member-List /] by access level / role

I need to sort an S2member list by the access level, as far as I can tell we can currently use orderby for these parameters:

“registered”, “ID”, “login”, “nicename”,“email”, “url” , “registered”, “first_name”, “last_name”, “nickname”, “display_name”, “post_count”

Is there any way to order the [s2Member-List /] output by the user level, in descending order? We want to list the highest level people first: L10 , L9, L8, etc…

Thanks.