You can treat a new dashboard as a web page, it can be sub-dashboard as another dashboard. On the dashboard, you can add some new Panels including KPIs (charts or data tables).
1. Click on “Create new page”
2. Fill in the below values :
3. Then, an empty dashboard has been created.
4. You can set the permission for this dashboard by clicking “Edit page properties”:
5. And select “Page permissions”:
6. You can setup different permissions to different roles.
Permission can set to the dashboard, you can also set to each KPI, please find more details from “How to add existing KPI and create new KPI?”