Sorry, my mistake: it is post #5. I'm sleepy at the moment, hope i understood you correct:
Code:
RewriteEngine on
RewriteCond %{HTTP_REFERER} !^$
RewriteCond %{HTTP_REFERER} !^http://(.+\.)?domain.com/.*$ [NC]
RewriteCond %{HTTP_REFERER} !^http://www.domainguest1.com/.*$ [NC]
RewriteCond %{HTTP_REFERER} !^http://www.domainguest1.com$ [NC]
RewriteCond %{HTTP_REFERER} !^http://www.domainguest2.com/.*$ [NC]
RewriteCond %{HTTP_REFERER} !^http://www.domainguest2.com$ [NC]
RewriteCond %{HTTP_REFERER} !^http://www.domainguest3.com/.*$ [NC]
RewriteCond %{HTTP_REFERER} !^http://www.domainguest3.com$ [NC]
RewriteRule .*\.(jpg|jpeg|gif|png|bmp|swf)$ http://www.domain.com/nohotlinking.jpe [R,NC]