Login with a regular user, and add a volume in their own namespace.
In catalog, user cannot see this volume and use it. However, use this volume from CLI is okay.

1. Login with a regular user "test" and create a namespace "test"
2. Add a volume "test" in namespace "test"
3. In catalog, the user cannot see volume"test"
4. Login with the user "test" in command line, and switch to project "test"
5. Create VM with this volume via below command:

# virtctl create vm --name=test-vm --instancetype=u1.medium --volume-datasource=src:test/test --cloud-init-user-data I2Nsb3VkLWNvbmZpZwpjaHBhc3N3ZDoKICBleHBpcmU6IGZhbHNlCnBhc3N3b3JkOiA2cmIxLW16NzctZmZ4cgp1c2VyOiBjZW50b3MK | oc create -f -                                virtualmachine.kubevirt.io/test-vm created

# oc get vm test-vm
NAME      AGE   STATUS    READY
test-vm   53m   Running   True

6. the VM is able to be created from CLI

Regular user cannot create vm with their own volumes from UI, but it's okay via CLI.

Regular can create vm from with their own volumes.