If you don't have many employees, I suggested you created a calculated field
If employee=A or B then manager=1 and so on.
So that you will be able to use this field in your chart as a filter.
Hope it helps
Le Wednesday, October 5, 2016, mark reves <firstname.lastname@example.org> a
Tableau Community <https://community.tableau.com/?et=watches.email.thread>
Help with Drill Down Bar chart
created by mark reves
in Viz Talk - View the full discussion
Not sure if this is what you are after, but here's an example based on the superstore sample database.
1. Create two separate "sheets" one by Manager, and the other by Employee (in this case, I have used Category and Sub-Category)
And then, on Sheet 1 (the manager sheet), create an action to filter the results of sheet 2, that looks like this:
And then create a dashboard where you show both sheets:
Now, on the Dashboard, when you click one of the bars on Sheet 1 (the manager sheet), it will filter the values on Sheet 2 (the employee sheet) to only show those specific employees.
Is that what you are trying to achieve? Please let us know.