Fees based on investment size

Is it possible to have different fees ( success and entry fee) based on the investors contribution to the managers fund?

Such as Fee X based on 100GVT, Fee Y based on 500GVT, Fee Z based on 1000GVT?

Some PAMM software allow different success fees and entry fee depending on the size of the investors deposit. I think this would be a great way to attract larger investment capital by offering a smaller success fee for these investors. 

Thank you