Ban by phrase in fileld/post

I started using this plugin about a week ago too, since I found my spam queue way too big. WP-ban has reduced the spam queue close to zero, which is great, but the only request I have left is similar to that of Repka. I can only ban IP’s (I haven’t found a host for any IP I banned), while most spam come from one emailaddress, but each time with a different IP. Can we use this plugin to ban someone based on username, used webaddress, used email address, “phrase in any field or post”?

I am getting a spam attack with over 30000 comments in 3 days. I blocked many IPs using WP ban, but they still keep using new IPs everyday. So IP block is not a solution.

Fortunately all comments use the same email and author name. How can block this?