Yes. The referrer prefix (
>) can be used to block pages referred from a site.
>somesite.com will block all pages where the referrer is somesite.com (i.e., if you click on a link on somesite.com then the linked page will be blocked).
Note that sometimes the URL of the referrer is not passed to the linked page, in which case LeechBlock will not detect it. In other words, do not expect this feature to work 100% of the time!