Zay-ES and hidden states

I’m wondering if there is any documentation about how to handle hidden states using an ECS like Zay-ES. With hidden states I mean sending partial information to the client, based on some condition, like the difference between a visible unit and a non visible one, where you don’t want to send the position. Or between friendly and enemy units, where a friendly one might reveal more stats. I haven’t seen any obvious methods of doing this. Thanks