Hi I just installed the component, good work !!!

I create hidden, non-anonymous surveys and will email the generated links via 3rd party email outside Joomla.
My problem is, I can't reconcile the responses with the link when I export the csv file.
Is there a way to save the referring url or the "generated key" ?
As far as I can work out from reading through this forum and docs, another option would be to force users to login, but that makes life too complicated ;-)

Thanks for your quick response.
Hans