Since the purpose of Hak Pakai is acquiring property for personal use, a person can hold only one Hak Pakai (i.e only one property). However, it is possible to acquire several properties with the Right to Build.
Note that you can hold Hak Pakai only if the land already has a building on it and there are limitations for operating a property with a Right to Use (Hak Pakai) certificate as a business. There is also minimum value to the property and it must be located in a touristic, residential, or trading area as you cannot acquire land in Bali in agricultural or greenbelt zones.