display part of the content to post author only

Hello Vasyl, great plugin!

I need to restrict part of a post only to the post author (only the user who created that post can see that block of content).

I guess I need to do it with content filter (https://aamplugin.com/article/how-to-filter-wordpress-post-content) but how can I pass the correct userID?
It is not a specific ID but it is a variable because every post has a different author.

Regards.