Hi @chiragrb7,
The security feature to prevent unwanted connections is not yet available in our current BETA version.
This feature will only be available once we released a PRO version.
For now, only disabling/enabling the spacedesk Server can prevent other users from connecting in your primary machine.
Also, you can always see which viewers are currently and previously connected via spacedesk Driver Console so your roommate cannot connect to your PC unnoticed.