This change could allow more specialized lenses; the functionality in question is already implemented in the search engine, this would just be a "convenience" feature.
Please forgive me if this is already possible and I cannot find it in the UI.
Let's say you are looking for discussions about a specific topic. The integrated "Forums" lense does not cut it, because all of the results are reddit. So you enter:
<query> inurl:viewtopic.php OR "Powered by vBulletin" OR inurl:newreply.php
That returns threads in phpbb boards OR vbulletin boards.
It seems that at the moment it is not possible to achieve this using a custom lense; I tried different syntax variations, but got results from e.g. Wikipedia. So maybe in the lense UI, another field could be added for "operators" or similar.
