Filtering Collection items based on user

I have a CMS collection on the User Account page. Is there a way to filter the data to only show items of the current user?

Not statically.
You’d basically need to emit the entire list into the page, and then filter it with custom code.

Absolutely a bad idea if you have a ton of data, or if it’s even mildly sensitive user information.

Another approach is to sync your CMS to Airtable using e.g. Whalesync, and then build a simple API using e.g. to retrieve the Airtable data specific to that user. That’s much better, and less vulnerable, but still not a -secure- solution.