WordPress at a glance
filter is not described

wp_auth_check_same_domain filter-hook . WP 3.6.0

Filters whether the authentication check originated at the same domain.

Usage

add_filter( 'wp_auth_check_same_domain', 'filter_function_name_6457' );
function filter_function_name_6457( $same_domain ){
	// filter...

	return $same_domain;
}
$same_domain(true/false)
Whether the authentication check originated at the same domain.

Where the hook is called

wp_auth_check_html()
wp_auth_check_same_domain
wp-includes/functions.php 5369
$same_domain = apply_filters( 'wp_auth_check_same_domain', $same_domain );

Where the hook is used (in WP core)

Does not used.