AKS clusters can be shared across multiple tenants in different scenarios and ways. In some cases, diverse applications can run in the same cluster. In other cases, multiple instances of the same application can run in the same shared cluster, one for each tenant. All these types of sharing are frequently described using the umbrella term multitenancy. Kubernetes doesn't have a first-class concept of end-users or tenants. Still, it provides several features to help you manage different tenancy requirements.

https://learn.microsoft.com/en-us/azure/architecture/guide/multitenant/service/aks