Bid Groups are what you want! They allow you to win one (or more) items, and then have the rest automatically cancelled!
Learn more here:
https://community.auctionsniper.com/4/OpenTopic?a=tpc&s=9654015631&f=7754015631&m=8204010641
Or visit our Bid Groups tutorial here:
http://www.auctionsniper.com/?p=bidgroup
Adam R.