User generated content - Can you track which user submits a post to CMS through Zapier & Memberstack

Been doing a lot of research to try and solve a deployment issue we are facing with our webflow site.

We use memberstack for registration & restrict content areas. That is working.

Next we want these users to submit user generated content, which is not easily done.

The only path I have found so far is send form submission through zapier and into the CMS database. There is also a complication that we want to allow a single image upload. It looks like we have to upgrade our current plan in order to enable that. There was also mention of issues with that but it appeared solvable/fixed at some point.

I need to link the user submitting content to the CMS entry. From there, display the username under the post & associate the posts created with that user.

Is this possible using currently available workflows?