I might be wrong, but it belongs to one of the people from Enteract (A Chicago based ISP).
http://www.geek-girl.com/about/work.html
says:
I'm a software developer at Secure Networks, Inc. a security research firm which produces Ballista, the best network security audit package out there.
Prior to this, I was Chief Technology Officer at EnterAct, LLC, a medium-sized Internet Service Provider based in Chicago, IL.
Before that, I was a postdoctoral fellow in the Neural Information Processing Laboratory at Northwestern University, the same lab in which I earned my Ph.D.
so it belongs to somebody who *used* to be one of the people from Enteract.
(Then again, the page also says
Last updated: Saturday, 14-Mar-98 01:35:02 CST
....)