Per-diem to be mapped with Different GL accounts with respect to Trip schema

Dear Sir,

At present sap system is calculating Per-diem as per our client's Requirement (Class of city and employee level).

Per-diem is calculation is as per sap standards.

But as per the requirement per-diem expenses has to be posted with respective GL account as per the type of the schema.

Could you please advice me to have the posting with different GL s with respect to trip schema.

Regards,

Sairam.