Is it possible to create more than one Data Masks Configuration across the organization?

I'm only able to create one mask which is named "default", yet Apigee mentions an api to get all masks across the organization and it returns an array. So is it actually possible to create a mask configuration that has the namespace other than default?

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Masking configurations can be set globally (at the organization-level) or locally (at the API proxy level).
Note that the name of the mask must be "default".

I guess we can only create one data mask per org. The name of the mask should always be default, and if we use another name it throws a 400 error.

I see there is an API to List All Masks(which doesn't make sense), it just displays null or default mask.