This is my visitor. Can she have an account and connect her laptop to our network?

Yes, she can, but please try to give Julia and me some notice when inviting a visitor. Julia will need to arrange for office accommodation for her, and depending on the length of her stay and her computing requirements, I may need to create an account for her on the Statslab desktops or to ensure that her office is set up for laptop use. See my page of information for hosts and visitors for more details.