Security controls may be applicable at different levels of the Azure infrastructure. Can you please elaborate what types of security controls you are thinking of?
Some typical security information as far as Azure NetApp Files (ANF), Azure Kubernetes Service (AKS) is concerned can be found here:
https://learn.microsoft.com/en-us/security/benchmark/azure/baselines/azure-netapp-files-security-baseline
https://learn.microsoft.com/en-us/security/benchmark/azure/baselines/azure-kubernetes-service-aks-security-baseline
Also, some starting points around Azure NetApp Files security can be found here:
https://learn.microsoft.com/en-us/azure/azure-netapp-files/faq-security
You can consider using Azure Policy with built-in or custom policy definitions to enforce certain security aspects:
https://learn.microsoft.com/en-us/azure/azure-netapp-files/azure-policy-definitions
Hope this helps you get started.