locked on different account

[khorne8kill]

i was playing destruction on my account and my son wanted to play using my computer using his account, when i logged off and he logged in it gave him a message at character select that he is locked to destruction for xx mins , now my son mainly plays order characters and he was quite upset as to not being able to play his toons,
just wondering why this has happened

[Acidic]

Believe the lockout is based on IP address

This is because a number of ppl have multiple accounts. Issue is identifying different ppl vs different accounts