Thank you, I tried tried to implement your solution. But it's not working as I would like it to work.
I placed the form and List module on my page, then I created a column with type "DOWNLOAD", and after that, I inserted a record, pointing to existing file on my site.
Then, I went to Admin>File Manager, and restricted access to folder containing my test file to unautehenticated users.
Now, if I am logged in, when I click on file to download, it works ok.
But if I am not logged in, if I click on the file to download it, I am redirected to the ugly ASP.NET 404 Error Page, saying: "The resource cannot be found"
I would like to show a message instead, explaining that the download is restricted to authenticated users only. Or, just to not show the download link.
Can it be done easily?