Erm, if they are just hotlinking an image and not linking as in href then no you cannot redirect their traffic.
.htaccess
RewriteEngine on
RewriteCond %{HTTP_REFERER} !^$
RewriteCond %{HTTP_REFERER} !^
http://(www\.)?domainsyouwanttoallow.com(/)?.*$ [NC]
RewriteRule .*\.(htm|jpg|jpeg|gif|png|bmp)$
http://www.redirectdomain.com [R,NC]
haha123 = the other bracket }