Hi Weric,
Thanks for checking out our plugins! Community Events has a setting that lets you require users to be logged in to submit events, and Event Tickets Plus has a setting that lets you require users to be logged in to purchase tickets. However, there are not currently options to set the specific user role. You could adjust the roles with a customization – our themer’s guide has more info on customizing our plugins.
We do offer full refunds within 30 days of purchase, so feel free to take any of our premium extensions for a test run! If you have any other questions, please let me know.
Thanks,
Jennifer