Feture request to assign users to categories; "willing to pay for it!"

[targetvision]

I would like to categorize my self hosted blogs (individual domains) and then let my blog writer only access blogs from a certain category so he can maintain them with fresh content.

So I want to be able to give users permission to access blogs form a certain category
With MainWP I can do this with the Extensions-Mainwp-Team-Control:
https://mainwp.com/extension/team-control/
https://mainwp.com/help/category/mainwp-extensions/team-control/
http://docs.mainwp.com/category/mainwp-extensions/mainwp-team-control-extension/
https://mainwp.com/help/docs/team-control-extension/

It doesn´t need to be that complicated, just need to be able to let users only access and login to the blogs from the assigned category with their associated rights like "editor" for example so they can add and edit content but not do administrative tasks.

Open for suggestions and budget needed!