I have tried the same parameter that the process you mentionned but with my process.
It's not working.
Once again I don't use portal I use FPM as type of form.
What I want to know it's how can I skip the first page where I enter the pernr for who I work with and go directly to the process with the pernr of the connected user.
Thanks for your time and sorry if I don't understand your explaination.