I\'m working on a website with a friend using Wordpress
and we are trying to access the same WordPress account from both mine and his computer, so that we can w
WAMP is local. You can move the WordPress install onto a shared hosting relatively painlessly and cheaply then can collaboratively work on it.
WAMP server is for local development (like XAMP, LAMPP and MAMP). When you install WAMP and install Wordpress inside it, it can be only accessed from that computer. You can create multiple admin accounts on single Wordpress installation. (Do not use single admin account for both of you.)
However in this case, you can't access the local Wordpress installation with multiple computers. to do that you may have need to buy a domain and a hosting from a hosting provider. Then you can create two admin accounts and start developing.
Or, as JJJ suggested you can convert WAMP+Wordpress installed computer to a server, but its hard and I do not think it'll be a good idea for this.