Amazon Managed Blockchain now supports assigning tags to networks, members, proposals, invitations, and nodes. Tags can be assigned to existing resources and to new resources at the time of creation. You can also define fine-grained access controls using tags and AWS Identity and Access Management (IAM) policies to control access to resources and actions. Tags are key-value pairs that you can assign to resources to easily organize and search for resources, automate resource activities, create cost allocation reports, and control access to resources.
Source:: Amazon AWS