Hi Amy,
Thanks so much for reaching out!
In general, Community Events works with WordPress default login and user system, so you should be able to see your users’ contact information on the back end if they are logged in.
If you’d like to add additional information to the Community Events submission form, I’d recommend copying and editing the template file for the submission form. Our Themer’s Guide can help to lead you through this process. The files to look at are community/edit-events.php and community/event-list.php.
If this functionality is a requirement for your intended project, I’d suggest that a third-party developer would be the best way to make this feature happen on a short timeline. ? We maintain a list of developers who work with our plugins on our Knowledgebase here:
https://theeventscalendar.com/knowledgebase/find-a-customizer/
Let me know how that goes and if you have any other questions on this topic!
Thanks,
Jaime