Make Specific Blog Posts Password Protected

Hi there,

I use the Wix blog for two different feeds on my website:

  • A public News section (…/latest-news)

  • A private /password protected employee blog (…/employee)

I filter them using the “Categories” option (posts are marked as “News” or “Internal”)

My problem in concerning the “Internal” posts:
Although I can make the “Post List” page password protected: (https://www.otodatatankmonitors.com/employee) ,
I cannot make the individual posts within password protected.

I assume this is because the individual article pages are auto-generated: all “/posts/” are shared by the public “News” articles too…

Is there a way via code to specify that anything categorized as “internal” is password protected?
or,
Somehow change all “internal” post URLs to include "/posts/ internal /…" require a password? Is this possible, or is there a better way to achieve this?

Thank you for your help