Maybe you don't have SAS EVM installed (or installed properly), it's not mandatory for SAS 9.4.
If nothing else you could parse your Metadata Server Logs... that contains information about everybody who logs in and, I think, enough info to find out the client.
We also have a separate program, ESM (Enterprise Session Monitor - https://boemskats.com/products/esm/) which lets us do things like this a bit better than EVM does. They've actually been acquired by SAS, so it might be easy to get their stuff added on.