It is possible to link filters between a set of reports situated in the same dashboard.
The following article will walk you through linking a filter between 2 reports under a field named "Category" which exists in both sets of data.
First, select the "Analytic Setup" tab and turn on "Link data" for all reports that are to be linked with a filter:
On the first report, select the field to be used as a filter and make sure the chosen field is ticked for all other reports:
The next step is to link the reports, in order to update the second report once the first has been filtered. Select the filter and field as shown below:
The filter will appear once the dashboard has been saved and activated: