User specific threads

[No One]

I asked this question on the myBB forum and was directed here by Leefish. I am currently running MyBB 1.6. As of now, I am aware that you can setup user permissions to only see their own posts. However, I am trying to utilize MyBB as a client portal for some of my clients, and I am trying to make it so that I can post threads in which only they can see.

Is there a way using Template Conditionals that I could post a thread only visible to specific users?

For example, I could post a project thread that would display details of a project. I would only want a specific user to see it. Almost like setting up permissions but by user instead of group.

I have the most recent version of Template Conditionals installed.