Any Applied Filters directly affect exports. The only data exported is the data that matches the filter.
For example I have 1500 Link Partners in muy account spread across 3 projects. 500 Link Partners in the project SnowShoes. There are 135 Link Partners assigned the the tag "Product Reviews" in the SnowShoe project.
If I am in the project SnowShoes and I filter all Link Partners by "Product Reviews" there will be 135 records returned. If I then do an export from Link Partners the resulting csv file will have 135 Link Partners.