Games : How to use command blocks to make a private faction

So basically I want to use a command block to tp anybody but me out of my faction upon entering.

What my command block says.

/testfor [r=5,Name=Gamersfunhouse]*

*I also have this for every other player on the server

nothing will work... I have tried to do somthing like this in it

/testfor [r=5,Name=, tp

Yet again to no avail. Please help I am sick of this.