Multiple User Levels For IP Cameras?

Have you ever seen the network camera which has none multi level user authentication except administrator? Do you think the multi level of password-protected user access control is compulsory on the network camera?

I am aware of almost every VMS has the feature for user authentication and support different user privileges based on logon ID.

One of my customer wants a ‘viewer’ privilege with password protected for the webpage access, but the network camera here only have the admin account and anonymous webpage viewer option.

Any advice and feedback would be appreciated.