Right now that applies to all posts and users, but it will be fine tuned to only affect "suspicious" users, like those without a certain amount of posts, registered within the last few months, suspicious mails and IPs and so on. However if you see a message that "You do not have permission to carry out that function." when posting, it means that your post is blocked by this anti-spam measure. Just remove the link (and the spam ) from your post and you'll be able to post.
Sorry for the inconvenience but unfortuantely there aren't any better options avaialble.