Hi Sandro, anything is possible but this sort of customization is so bespoke I’m afraid we can’t really offer much support – you would need a really good understanding of both WordPress and PHP to implement this currently.
It may be that a future release of Community Events includes the ability for users to edit any published events they have already submitted, so that may fit your needs, however this is currently only a feature request and is still under consideration.
Of course if you do figure out something feel free to post back with your solution so others in the community can benefit, too!