there are two possibilities how to apply requested feature:
1) Maybe it's would be enough to export products which are in one certain shoppergroup only.
You can do that like here:
This feature is available in the free and professional version.
2) Maybe this feature is not good enough for you - in cases, you need to:
- export products from more shoppergroups except that one
- exclude from export products which have two prices (default price & Wholesale)
Then there is no way how to do that at free version.
There is no way how to do that in the professional version, but I can modify the component a little bit, it would be possible.