Max, if you're just logging to the server to look at an application being hosted there you can login from as many locations as you want, if you're login in with the same user it will use the same CAL.
If you're looking to lease a license in order to be able to do local offline development. You can lease the license from 2 different locations. The 3rd time you try to lease that license you will still be in personal edition mode.
You can then try removing that license, waiting for the quarantine period to end and then assign it again to be able to lease it from a 3rd location.
Daniel, thanks for your help. Usually our users will only use their own device to log on. If they are connected from another computer they will probably use the browser (as we do not have a client installed on every computer). In some case we have meeting rooms with a computer linked to the beamer. The participants of the meeting would not use their own laptop/notebook/PC but the computer installed. On that computer we have a QV-client installed. say the user has logged on to the client on his computer, then to the client in "Meeting Room 1" and logs on to the client on the computer in "Meeting Room 2" the user won't be able to work. To be on the safe side I think users should access dashboards via Browser. That would be slower but it should work. BR, Max