show_network_site_users_add_new_form
Filter Hook: Filters whether to show the Add New User form on the Multisite Users screen.
Source: wp-admin/network/site-users.php:349
network_site_users_created_user
Action Hook: Fires after a user has been created via the network site-users.php page.
Source: wp-admin/network/site-users.php:88
show_network_site_users_add_existing_form
Filter Hook: Filters whether to show the Add Existing User form on the Multisite Users screen.
Source: wp-admin/network/site-users.php:212
network_site_users_after_list_table
Action Hook: Fires after the list table on the Users screen in the Multisite Network Admin.
Source: wp-admin/network/site-users.php:294