Control Users listed in Users List on dashboard

WordPress doesn’t know which user created which, so first you need to store the creator’s data in the newly created user meta so you can so something like this:

add_action( 'user_register', 'Store_creator' );
function Store_creator($user_id){
    $creator = wp_get_current_user();
    //only do this when none admin creates the user
    if ( $creator->roles[0] == 'administrator' ) return;

    update_user_meta($user_id,'_creator',$creator->ID);
}

Then you customize the list of users he can see based on that meta:

add_action('pre_user_query','custom_pre_user_query');
function custom_pre_user_query($user_search) {
    global $wpdb;
    $user = wp_get_current_user();
    if ( $user->roles[0] != 'administrator' ) { 
        global $wpdb;
        $user_search->query_where = 
        str_replace('WHERE 1=1', 
            "WHERE 1=1 AND {$wpdb->users}.ID IN (
                 SELECT wp_usermeta.user_id FROM $wpdb->usermeta 
                    WHERE wp_usermeta.meta_key = '_creator' 
                    AND wp_usermeta.meta_value = {$user->ID})", 
            $user_search->query_where
        );
    }
}