Yes, that is fine. Using dual logins to gain knowledge of enemy alliance movements in PvP or to control both accounts at the same time with a script is not allowed, but taking photos doesn't violate any rules.
PC NA, CP2500+. Character creation is the true endgame.
You can also log in both accounts to transfer stuff between them. Basically, as long as you aren't using macros or third party apps to move etc the characters together, or running adventuring content together you're fine.