Access rights to uploaded files

Hello,

I would like to ask if there is a way of restricting access to particular uploaded files. In Drupal 5.x, this functionality was implemented by upload module which restricted access to a file depending on access rights to the page the file was associated with.

In Drupal 6.x the files are associated with users and the access control to files seems to been removed from upload module.

What I would like to do is to have some pages and files available for public and some pages and files available only for particular roles.

Thanks.