How many NET keys & APP keys, provisioner could attached with #BlueNRG_Mesh Node ?

How many NET keys & APP keys, provisioner could attached with &sharpBlueNRG_Mesh NODE ?

I need at least 2 NET keys & 2 APP keys as per Bluetooth SIG specification.

One pair (APP + NET ) will be for Admin of Network & one for Guest. I planning to share following data to my Guest

= Encrypted( Guest NET Key + Guest APP key + Time period to access network)

On Guest App, it will decrypt this data in background & allow my Guest to access the network till scheduled time period.

Is this sensible implementation ?

Otherwise Admin has to assign-remove GUEST keys every time.

Thank You !!