As Chapter 52 explains, once a Webmin user has been granted access to a module he can be further restricted to only a subset of its functions. For the Samba module, you can allow a user to edit only certain types of settings in certain shares while denying him the ability to create new shares or edit global options. This can be useful if you want to let someone edit the settings that apply to the sharing of only his own directory, while protecting the rest of the Samba server's configuration.
I would advise against granting even limited access to this module to untrusted users, however, as it has many features that could be used by a malicious user to gain root access to your system. For example, someone could allow guest access to a share with root permissions, allowing the remote modification of any file. Or they could set the command that is run as root at client connection time to something that changes the root password.
Instead, these access control features are should only be used to limit the changes that an inexperienced—but still trusted—user can make. To restrict such a user to only editing a few shares, follow these steps:
18.191.60.249