User level filters limits data based on criteria associated to that user. For example, a national manager may be allowed to see data for all regions, but a Regional manager is only allowed to see data for their specific region for the same dashboard.
To set the user level filters, set the User Filter either during user invitation or if the user is already in the system, via the Edit User From the Team Menu.
Following example limits a user to a specific organization_id, applied on the top of the results of the query. Note that the organization_id must be present in the dataset for the filter to take effect.
Also note the second filter is a query parameter called $c9_region$ passed into the query.