Method for showing Individual Metric dashboards

I run Grafana in a call center for statistics and call metrics. I made an individual dashboard that managers can change which employee they can view through a variable. I have a need to display individual statistics per call taker that they can bring up on demand. These individual statistics should not be accessed by others. I know I can setup 40 individual folders and dashboards so that only that person can view their statistics. Is there a way that the variable can be passed and the person is not able to change the variable?

The data source is MSSQL and we use AD logins.