Any way to "hide" specific stuff from topics (for logged in only)?

Hi all,
I wanna create a category where users can upload stuff.
Visitors should be able to see that stuff, but only be able to download when logged in.

Any idea how to create that?

This seems the same question like this: Show download button to logged in user

Can you clarify it more specific? Some example and mockup would be helpful. :slightly_smiling_face:


Thanks Don