Situation: I have a business directory that allows each business to have a unique page. Their page is generated based off of "&ListingID=###"

I'd like to be able to use the Journal for visitors to that page to be able to post comments, but I only want it attached to that particular page. I looked in the settings for a way to do this an there is not.

Does anyone know of a "hack" or some safe way to get the journal to recognize  a custom URL paramater? 

Perhaps this is a feature request... but I think it would be a great one. That is, the ability to add a custom paramater(s) to each journal instance to further the customization capabilities.

Anyone have thoughts on this?