Hi Tara,
Thanks for considering our plugins for your project 🙂
Our Community Events plugin will allow you to accept submissions from the public but doesn’t bake in the sort of functionality you are asking about. With that said, you could get there quite easily with a bit of creativity.
A plugin like WooCommerce can be used to sell things (such as a product representing permission to post events) and you can tell it to generate a new user account for each customer. You can also force Community Events to only accept submissions from logged in users — by combining these bits of functionality you could get close to what you want to achieve, and with some custom dev work you could build something more advanced such as pay-per-submission, subscription tiers and so on.
However, I’ll be clear that it is not a core piece of functionality that is supplied out-of-the-box by Community Events.
I hope that answers your questions, but do let me know if I can assist with anything else.