No, IPs don't matter that much, however it's not advisable to use your tracker account from places that have other BakaBT users as well as public computers.
What Krudda mentioned is that you shouldn't seed/leech same torrents from different places at the same time. And lastly Bozobub mentioned that if the place you're planning on using has another BakaBT user behind the same router you should come to #bakabt-support, if it's just a different location/IP without any BBT users that are known to you (friends/co-workers/roommates), you may may safely disregard that.