How can I play BF 2142 against my son 2 computers same household?

Hello ,

I have BF 2142 and my son wants to compete against me online. We have 2 computers one of them running on a wireless router. My questions is am I able to install the game on both of my computers and compete against him or do I need to purchase another copy of BF 2142? If I do need to purchase another copy would I need to create a seperate account for my son?

 

You need 2 copies and 2 accounts.