I don't know the answer to this by the way, I don't even know if there is an answer other than no, but my question is:
Has a player that has transferred from one club to another in the January transfer window ever scored in both league fixtures involving the two clubs in the same season?
So for example in both the folowing fixtures:
Old Club vs New Club
New Club vs Old Club
(It can be any league, but due to the restraints of my question, the transfer must have obviously taken place between clubs in the same league.)