Multiple operator login code

Does anyone have an example of how they have created multiple operator passcodes option that uses a list of passcodes for access?  Ideally, i would like to have this added to a log as well.

I have a single passcode option that works, but I'm using an IDC with a specific code stored in the activating field. I would like this to use a list of codes that could be changed in the adjust menu by a parameter.