No. In AUT10, you can't select the release code. AUT10 is for changes log.
As we know when someone release the PO the release indicator got changed. So we can see the release date from this t-code.
Now your requirement is as per release code and there are no option to choose release code in AUT10.
You can find the PO which is released under the release code.
In that case, you can use two steps to get the PO numbers.
Take the all PO numbers from AUT10, which is under the release date.
The go to ME28,
Here enter the release code, all PO numbers and only select the tick for Cancel Release and the execute.
You will get the PO numbers which is released from particular release code from the all PO numbers.