Do Organizations Tag Policies support Principal references

Hello, I need to write an Organizations Tag Policy that carves out an exception for a particular AWS Principal - in this case an IAM role. Is this possible? It's not clear from the documentation https://docs.aws.amazon.com/organizations/latest/userguide/orgs_manage_policies_example-tag-policies.html ... simply because it doesn't mention Principals, I am thinking they aren't supported.