Great question – and thanks for considering our plugins 🙂
What you want is not facilitated directly out-of-the-box, you’d need to do a little customization work. With that said, such a customization needn’t be overly complicated – all our plugins are customizable and the ticket form for instance can be cleanly overridden, letting you workaround this by checking if the user is logged in and, if so, showing one ticket (or, if not, showing a different one … one being free, one having a cost).
So though it would take a little bit of work to do this it probably isn’t too hard in the scheme of things, depending of course on what you’re comfortable with.
I hope that answers your question, but let me know if we can help with anything else.
Thanks!