"those using" is correct and usable in written English.
You can use it to refer to a group of people who are doing something. For example, "Those using the stairs should use the left hand side."
Those using excessive force.
Those using natural gas will spend 38percentt more.
Stories are geared towards those using ferries or trains.
The highest scores were among those using nonhormonal contraceptives.
Those using older technologies, for instance, may benefit less.
Electric-traction systems can be broadly divided into those using alternating current and those using direct current.
The Department for Transport has increased the punishment for those using a mobile at the wheel.
Gas lasers have some advantages over those using ruby and other solid materials.
Those using heating oil will pay $250 more than last year, a 20.1percentt increase.
He added that those using the site would not see any reduction in services.
Will those using it have a distinct advantage over those who do not?
