Question:

Can object workflows be made available, or visible, to specific object records in Vault?

Answer:

No, object workflows cannot be made available or visible for specific object records.

Object workflows are available to all object records that meet the specified criteria. 

Example: If an object workflow is created for object A, it cannot be restricted so that it is only available to one or some of object A's records.

Related Documentation:

Vault Object Workflow Documentation: Configuring Object Workflows