re-login

is there a way to build a feature that a user can re-login (with another username and pasword) without closing manually the complete solution?

something like: application.relogin

that the current solution closes and immediatly starts again and comes with login: username and pasword.

Why would you need such a thing? you can add a user to different groups already…

We have seen situations that an administrator (beheerder) wants to change things on a computer, where normally someone else is working. Now he have to completly shutdown the client and restart it again. If he could re-login, within the client, that would be much quicker!