If querying by Primary Constituency Code:

1. Select the Format tab of the Tallies report.
2. In the Details section, mark Include constituent for the primary field values
 

With this option selected, the constituent is included in the constituent code that is their primary code.

If querying by Constituency Code (or any other field, such as Attributes):
1. Select the Format tab of the Tallies report.
2. In the Details section, mark Include constituent for all field values

With this option selected, the constituent is included in the count for each constituent code on their record.

Here's an example -

Bob Smith is in your database as a Board Member and a Volunteer.  Board Member is his primary constituent code.  With the Include constituent for the primary field values option marked on the Format tab under Details, Bob will be counted under Board Member only. If you mark the Include the constituent for all field values option on the Format tab under Details, Bob will be counted under both Board Member and Volunteer.