How to check a request from EP or AX client?

Hi,

I have a data entry form both in AX client & enterprise portal.

AX client user (power user) should be able to select worker from the dropdown list of worker id. But when person uses enterprise portal, i want to use the label to show his name & initialize his worker id. 

I am planning to write this code of initialization in Init method of the Table itself. please guide me if there is any better way to initialize.

but to initialize worker id in init method, i want to know from where the request is coming. i.e. EP or Ax client?

Please help.

Thanks.