I know now what is the misunderstanding, is my fault.
I have use
http://domain.com/wh_art/ like it was an external site, but is just an example.
A reality snapshot:
I want activate the HotLink Protection in
http://www.wizhosting.com/(So, nobody can hotlink my images in their sites, right?)
B U T !!
I want a directory,
http://www.wizhosting.com/wh_art/, when i can put public-free-for-hotlink images (my banners, ads, logo, etc).
So, when x.com hotlink an image of my site, the hotlink protection will prevent this.
But if x.com hotlink some image stored in the directory ~/public_html/wh_art/ from my wizhosting account, like
http://www.wizhosting.com/wh_art/banner.gif, or the avatar for the forums, etc..... it's all okay!
I hope it's more clear now, sorry for spent your time.
Somebody have some ideas for me?