1. In QMC, select the sheet Documents
2. In the treeview, select the QVW you want to configure
3. In the right panel, select the sheet Document CALs
4. You must set the 'Number of CALs Allocated to this document' with the maxinum number of Doc CALs users can lease (this option makes more sense when you use it with the 'Allow Dynamic CAL assignment')
5. In the Assigned Users list, you man manually add the users. You can also delete the obsolete CALs leased.
(I'm assuming you don't have Publisher installed. When QVP is installed, the layout is a little bit different...)
Hope this helps