Drop down option in Dashboards

It would be nice to have a custom drop down option for dashboards to apply filters. For example, in my case I have multiple clients that I want to create a dashboard for but instead of having to create multiple dashboards for each client a simple custom drop down option would be wonderful. This would be very similar to when you select multiple company's while creating a report. Currently in Reports, you can create the report and in the preview there is a drop down of all the selected company's. There is a way to do this with the filter option, but it is a pain to have to always unselect all the companies you do not wish to see data for.