I am not sure if you are still looking for a solution to this but I think I've found a way to get at least a few of these things accomplished.
- View the name and group of the logger user permanently on a view
- Retrieve this information at the level of my strategy
Yes, you can do this and the only way I know how to do it is to do both simultaneously. There is an option in PAC Display Configurator -> Configure -> Runtime -> Security -> Runtime Logging. This allows you to create a log that gives a time stamp and user name/user group to everyone who logs into PAC Display. You could use PAC Control to read this log file and parse the strings to see the Username/Usergroup of the person logged in. Now the information is in your strategy and you could display it in PAC Display if you wanted.
- Add users and change passwords in runtime
Unfortunately I do not know of a way to do this. The user's are configured as a part of the project, so adding them on the fly may not be possible. So for now, I believe it is No, but I will see what else I can find out.