Apply filter to a scheduled report email

We collect data from different locations in a continuous survey In the first question the respondent has to fill in for which location the survey he/she is answering the questions (in some cases we use embedded data from our mailing list).
Each month the manager of each location should get a scheduled report with the results of only his/her location. So an automated, monthly report for only one location, not all responses.
At the moment it is only possible to add a filter when logged in, but not when creating and setting up a scheduled report (mailing a PDF). So adding this feature would be very helpful to reduce work.