For more information about plan types and capabilities, see Vanta's pricing page
If there are specific domains that your organization would like to block from requesting access to your trust center, you can do so on the Trust Center settings page.
From the left-hand navigation panel, select Customer Trust
Select Settings
Scroll to the bottom of the settings page
Select + Block Domain
Enter the domain you would like to block from requesting access to your Trust Center
Select Block
Keep in mind that this only pertains to restricted Trust Centers. If your trust center is public, anyone with the link can access what you have published.