How does file limitation / file access work in the plugin?

WP File download is using WordPress native User roles. You have 2 options to define file display on public side and file management on admin side. Limit access to file on public side: on each category you can define in one click with user role will be able to see the files. For example select subscribers to limit the files to be viewed to subscribers only (registered users on your WordPress website) To limit access to files management, you have dedicated interface to define actions per user roles. For example witch users will be able to edit it's own files, edit all files, add files, delete files...

插件中的文件限制/文件访问权限是如何实现的？

WP File download功能使用 WordPress 原生用户角色。您可以选择两种方式来定义文件在公共端的显示以及在后台的文件管理。

限制公开文件的访问权限：您可以为每个分类设置一键式用户角色，从而决定哪些用户可以查看哪些文件。例如，选择“订阅者”即可限制只有订阅者（WordPress 网站上的注册用户）才能查看这些文件。
为了限制文件管理权限，我们提供了专门的界面，方便您根据用户角色定义操作权限。例如，哪些用户可以编辑自己的文件、编辑所有文件、添加文件、删除文件…….