It depends on what you're trying to accomplish.
For instance, if you're trying to send a report to all salespeople to show their territories only and then send the same report to all salespeople with all the data, then the following will work:
- Create report and salespeople as you have already done
- Clone report
- For each chart in the report, apply a filter which uses the "clear selections" parameter for all the dimensions you don't want to filter (see: How to Apply a Specific Filter to Tables or Images).
Add both reports to the Task.
If instead, there is only one salesperson to whom you want to send both a filtered and unfiltered version of the report then as you noted the easiest way to accomplish this is to create a "second" salesperson with all the same delivery details but different filtering details.
If the salesperson you are sending the unfiltered report to, then you will need to set up 2 recipients with the same email and file location - I would suggest including something in the recipient name to indicate this persion is also a manager. Then as you stated, this recipient would not contain any filters