[openssl-users] CSR with multiple subject names?

[l vic]

I am working with service with TLS authn that uses subject name to
authenticate client.
Is it possible to use list of subject names in client certificate so that
service could authenticate several clients with the same key/certificate?
If not, would it be possible to use alternative subject names for the same
purpose? Can SANs only used in the context of DNS domains, eg to
authenticate the same subject name calling from different DNS domains?
Thank you,
lvic
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