Yes it is possible and there are 2 ways (I know of anyway) that you can do it.
1) Base the second subform on a query with the linking criteria taken from the first subform eg
1st subform = Orders
2nd Subform - OrderDetails
1st Subform linked to Mainform by Master/Child CustomerID
2nd Subform NO master/child link but in Query supplying 2nd subform,
in OrderID criteria : =Forms!NameofMainForm!NameOfSubform1!OrderIDControl (I would check the subform syntax of this though)
2) Use a master/child link from the 1st subform to the 2nd subform (A little more tricky)
Get back if you need more clarity!