Ben’s Place writes about MQTT with multiple groups of users accessing a single broker but each groups messages are partitioned from other groups even if they use the same topics. This means that any client can connect to the broker via MQTT, MQTTS or MQTT over WebSockets.
Diving into the mosquitto mosquitto develop branch v2.1.0:
In this branch there are a number of example plugins, one of which provides this 20 seconds subscription behaviour, but also several others. One of these caught my attention called topic-jail.
This plugin would create 2 topic domains, if the client id was set to jailed it would alter all messages from that client with a topic prefix of jailed/ and would also strip that prefix when delivering any messages to that client. All other client ids would have their topics left alone. This looked like it could be modified to solve the multi-tenancy problem.
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