network_site_users_after_list_table WordPress Action Hook
The network_site_users_after_list_table hook is called after the list of users for a site has been displayed in the Network Admin Users list table. This hook can be used to add custom actions or columns to the list table for a site's users.
do_action( 'network_site_users_after_list_table' ) #
Fires after the list table on the Users screen in the Multisite Network Admin.