Keep user logged into my networks after they login through one network ?

Maybe a way to keep all the users loged in all the network ?

I mean – keep a user logged in every network he visited. Anyways he using the same password and database

Found a solution !!!
adding this the my config.php
// Cookies
define( ‘COOKIEHASH’, md5( ‘mydomain.org’ ) );
define( ‘COOKIE_DOMAIN’, ‘mydomain.org’ );
define( ‘ADMIN_COOKIE_PATH’, ‘/’ );
define( ‘COOKIEPATH’, ‘/’ );
define( ‘SITECOOKIEPATH’, ‘/’ );
define( ‘TEST_COOKIE’, ‘thing_test_cookie’ );
define( ‘AUTH_COOKIE’, ‘thing_’ . COOKIEHASH );
define( ‘USER_COOKIE’, ‘thing_user_’ . COOKIEHASH );
define( ‘PASS_COOKIE’, ‘thing_pass_’ . COOKIEHASH );
define( ‘SECURE_AUTH_COOKIE’, ‘thing_sec_’ . COOKIEHASH );
define( ‘LOGGED_IN_COOKIE’, ‘thing_logged_in’ . COOKIEHASH );