so...i've got a blog on wordpress.

it will show how many people visited on any given day, and the referrer if there was any (which is usually always the totally ambiguous facebook.com/home.php? *lol*)
i want to make sure that one particular IP never shows up *lol* (ADD remark: wouldn't it be cool if you could get an alert?? abort operation! shut down your blog! it's been infiltrated! *lol*)

1/are there any IP trackers that i can put into wordpress?
(btw i'm sooo not java-savvy so if it requires adjusting the page coding please break it down for me--thank u!)

2/also, is it possible to search bloggers by their email address?

thank you!