If you got LimeWire from the official site there are no viruses in LimeWire. The link below will take you to the official site.
http://www.limewire.com/english/content/home.shtml
LimeWirwe is open source so it is possible for someone to change it and add a virus or spy ware to it. So if you got it from anywhere but the official site it is possible for it to container a virus. But if your virus detector says the official version has a virus then it is giving you a false positive report