Display User Specific Posts
Divi 5 first
This uses the Divi Machine Archive Loop module, not a Machine Accounts module. On Divi 5, set Relationship Type to Current User's Posts. On Divi 4, set Post Display Type to Current Users Posts.
Use this when an account page should list posts the logged-in visitor wrote.
Divi 5
- Edit the account post in the Visual Builder.
- Add Archive Loop from the Divi Machine / Ajax Filter modules.
- Choose the post type.
- Open Content → Loop Options → General.
- Set Relationship Type to Current User's Posts.
Full Archive Loop settings: Archive Loop (Divi 5) on the Divi Machine docs.
Divi 4
- Edit the account post in the Classic Builder.
- Add Archive Loop.
- Open Loop Settings.
- Set Post Display Type to Current Users Posts.

The screenshot above is the Divi 4 module. Divi 4 Archive Loop settings: Archive Loop (Divi 4) on the Divi Machine docs.
Visitors only see their own posts while they are logged in. Put the loop on an account page such as a custom endpoint so it sits behind the account navigation.