Is it possible to have a arm follow the camera with out any one seeing it? [closed]

I have made it in my game that players are all ways in first person, i have also made it that they can see there right arm. But I wanted to have that arm follow the camera around like you would see in minecraft. But every one will see each other with there hands out. Is it possible to make that only you can see your hand and, you can't see and body else. So you would see every one else hand down by there side, in less they were holding something.