In order to be able to automatically assign leads to a custom campaign that you have created, you must HAVE an automated lead gen site/ landing page with us.
If you do have an automated Lead Gen site, plus another site with us, you can create automation for any of your incoming leads :)
I was looking for this thing for a long time and finally, I found it here. I will get leads by implement all of these things on client Invictus property management project