After searching the forum, it appears that a post in this section is how it's usually done. Sorry if it's in the wrong place (or wrong approach entirely).
Got a friend staying for a few weeks and since we'll be gaming from behind the same router we might appear to be one person multi accounting - hence this heads-up.
His character is called Arrow4U, and I'm playing ANGST_Robert_of_Drugsley or other characters on the same account. Thanks in advance for not banning us