New Post: Site Specific Searches

Does this tool support filtering results for a specific site? I want to use "path" in the query string but don't see an option for it. Putting it into the Query Text does not seem to work for me either.

Thanks

Reference
http://sharepoint.stackexchange.com/questions/100726/how-can-i-search-a-specific-subsite-using-the-rest-api-in-sharepoint-2013