Multiple users to post donations

I’m not sure exactly what you are asking, but yes, different users can create different donations with GiveWP.

If you are instead asking if folks can create donation forms from the front end of the site, yes. That’s also possible. See this tutorial: https://givewp.com/create-a-peer-to-peer-give-campaign-with-caldera-forms/

let me know if I am misunderstanding the question. Have a great day!