We have a use case where would like to have multiple (two, to be specific) segment clients with different keys.
I was not able to find anything specific to this use case. But since SDKs like Segments are usually used as a singleton instances which is likely the case here as well.
We do have a workaround which is is to use a proxy server for the second instance. But if it can be done on the app side that would be way faster to implement.