yes it can because reducing the intake of proteins reduces the number of calories consumed during the day. The less calories you eat, the easier it would be for the body to consume its store body fat resulting in the person loosing weight.
I know a person who has times where all he will eat is protein for like a week and he looses weight,but I don't have a medical explination, but I would say yes.
If you maintain a good diet and exercise everyday, you should lose some weight. Remember not to completely exclude carbs, just eat the right ones. If you do set a particular diet, make sure you get...