GL Allocation for non STAT currency

We have a requirement to allocate a specific GL balance across multiple cost center (not in STAT currency). This cost centers are not in the same hierarchy.
I have tried to create the allocation rule from the calculation manager, but it is not allowing me to select the cost centers from multiple parents. Also am not sure whether we can create rules for non-STAT currency. Does anyone have similar requirement, where allocation manager has been used to allocate balance in one account across multiple cost center?

Thanks in advance.

Regards,
KD