Set minimum mysql IP limit for database security engine

I want to assign a mysql account to each client instance for a certain period of time, and I want the IP limit of mysql account access to be fixed IP.

I wonder if there will be a variable called host that represents remote host in the creation statements, but there isn’t.

I have looked for many issues and discussions, but have not found the answer.
Does vault currently not support this feature?
Is there another configuration that can solve my problem?