If you only assign each post 1 category, it is possible. In fact, it’s possible with multiple categories but in this case, the related posts are duplicated in case they’re assign to multiple categories too.
You will want to use the Current Post Terms as your Looper Provider
Then, you let an element consume the categories then an element inside it to be a Looper Provider for the actual posts.
For example, you set the Section as the Current Post Terms provider. You set the Row inside it to be a consumer. The Column within the Row should be a Looper Provider with the following setup. You can also set the column directly as a consumer.
If your category setup is complex or you’re using multiple categories per post, regretfully, the Looper has no setup for that yet.
Hope that helps.