Hello,
This is possible, but the IsReadOnly command in qRules is not what you want.
Let's say that you have two groups: writers and readers. On load you determine whether the person opening the form is a writer or a reader. If s/he is a writer, go to view A. If s/he is a reader, go to view B. You could even have a view C if the person is completely unauthorized.
Since this is more of a Sharepoint question and not qRules, I'd suggest you open a new thread in the Sharepoint Integration forum to seek answers from other community members.
Good luck!