Yes, that's correct. P2pool creates a new address when it connects to bitcoind for the first time & names the account "p2pool" & mines to that address.
Glad you got it sorted, welcome to p2pool!

sir,,can you check please, is this correct?
for first time,my hashrate jump over 4 TH, and i rebooted my speed normally, but why too many rejected?
my setting diff = 2048 ,i'm using antminer s4