When you export, you will export everything in the table view. You will need to filter down the what you want to export somehow. If you want to stay with the click to narrow down what you want to export you can do this with an action filter.
I've attached a workbook. See dashboard 3. When you click on the distinct counts now in the top chart, the bottom will now filter to your selection. You will need to click somewhere in the bottom table prior to exporting.
Probably not ideally what you're looking for.