How can I connect source control to my team over internet?

I had been try to get my team go on my workspace and start from there where I have done so far, I have been try to get my 3D artist go on my project through source control. And help me fill in the level with his art job.

I have been set up my admin and successful connect to my project and successful to checkout and stuff.
But I cannot take my team join up on my workspace using perforce P4V. Sound like it is for local only instead of oversea because I’ve been use teamviewer to remote control my team’s desktop and done it in the order and it wont find my workspace or their account I’ve create for them in P4Admin.

How can I team up my teammember into my project using source control instead of upload via dropbox?