Different join accept delays per end device

Hi,

I just like to ask, is it possible to set a specific Join Accept delay for a particular end device? Meaning, there will be different Join Accept Delays for device1, device2, and so on.

The Join Accept delay is a fixed-value (RX1 = 5 and RX2 = RX1+1 sec) per specification. It can not be configured per device.