r4nchy that's certainly possible, but it would be custom development which the RSS script in its current form will not support.
You really need a similar script, but one that can parse each line of the CSV file and create a post from it. In addition, attribution to specific users isn't going to be easy unless the script assumes ownership of all content. When using the API, you specify a user who completes the transaction, meaning each user attribution would have to be dynamically set on each run. Doing this programmatically is possible, but a lot of work.
I'm happy to do it if it's what you need, but it will be chargeable. Contact me on Discord - phenomlab#4801 to discuss rather than clog this thread.