Short answer: yes you can! We support WP Multisite on all our plans and servers without any charge.

If you use Multisite with subdirectories (example.org/multisite/) then it will work out of the box.

If you use Multisite with (sub)domains then you have to manually add the (sub)domains to the Domains section in your environment. After they are added and the DNS is set up correctly then you are ready to go.