Block IP when spammed?

Never mind, I found it. Thanks.

yes, that is possible
put this in your .htaccess file:

order allow,deny
deny from xxx.xxx.xxx.xxx
deny from yyy.yyy.yyy.yyy
allow from all

where xxx.xxx.xxx.xxx and yyy.yyy.yyy.yyy are the IP addresses you wish to block. You can add as many as you like.

more info:
https://httpd.apache.org/docs/2.2/howto/access.html

Wondering if there would be a plugin that would attached to the comments section in the admin area?

(Instead of having to do this manually)