Yes, just tell the server who/what will be paid for using dining credits and what will be paid for OOP.
The only venue that might not allow it is VN. You cannot use 1 credit to feed two people. So, you can't share a pizza/entree with your daughter and pay using a credit. However, you can still mix DDP and OOP...you just can't share the entrees.
Sometimes folks want to know if they can use 1 credit and pay the other half OOP at the 2TS venues (e.g., CRT). This cannot be done. If the venues costs 2TS credits, you have use 2TS credits if you plan to use the DDP. You can still pay for some folks' meal with the DDP and some OOP. (You can mix DDP and OOP to pay the entire tab, but you can't split an individual person's cost.)