A feature of the Imbedded Interface Points (IIPs) is that they can be used to automatically change one user profile to another. (See avPrivateConnect or avSetSessionValues (VLF-WIN).
In VLF-ONE applications this can also be done – but the logic needs to be (re)executed on every server interaction.
This can be useful if you have many users who fall into a few standard categories and you want to avoid registering them all in the Framework. Refer also to More details about being signed on as a Different User.