Hi,
The short answer is No, unfortunately. Once you have designed your report with the dimensions in the report pages those would remain available for filtering.
There might be a couple of solutions to save the space when showing the report on the dashboard. First, you might consider moving the page selection to the report columns and select only the member you need.
The other could be to redesign your measures using tuples to show filtered values without using the page filter. For instance, if I need a report to show the Issues created for the Demo Alfa project, I can create a calculation with the tuple which would be equivalent to the page filter:
([Measures].[Issues created],
[Project].[DEMO Alfa])
Please, find here the dashboard of the three reports each a bit more condensed:
Kindly,
Janis, eazyBI support