The OP was asking about multiple forum accounts.
He wasn't asking about joining signature campaigns.
Multiple forum accounts are allowed from the same IP.
I agree with Vod. The question was only related to multiple accounts on BTT not on using it to campaigns.
bounty manager don't like double account.
I heard the gossip that someone bounty manager could see the participant ip that joined his bounty, this is bad for static ip user on suspicion of cheating (participate in double account to get more reward).
Please don't confuse other readers. The post is only pertaining having accounts with same IP on BTT not joining signature campaigns with same IP.