The phrase "a real person using" is correct and usable in written English.
It can be used when discussing the actions or experiences of an actual individual, often in contrast to a fictional or automated entity.
Example: "In this study, we focused on a real person using the application to gather authentic feedback on its usability."
Alternatives: "an actual person utilizing" or "a genuine user employing".
An initial head model is first obtained from a real person using a laser scanner.
Why, some might wonder, would Mr. Brown, presumably a real person using his a real name, go public with this information, given the risk?
"You can then know that the caller is a real person using a real phone number," Google said.
Leaving aside the fact that no one ever claimed that Ferrante actually was someone else, a person who existed, but only the constructed persona that a real person used to write novels, there's still something awful about this second piece.
He turned out to be a real person who uses a computer program to make sure his replies were first.
In others, a real person can use their life experiences and combine them with your policies and procedures to arrive at a satisfactory outcome.
As for the inhumanity of computerized answering systems, we could press our way through until we get a real person and then, using the authority of age, work our way up to as high in the organization as we can get.
The company reprimanded the Drug Enforcement Administration for creating a fake profile using a real person's information and personal photos to assist in an "undercover" sting investigation, saying that they found the activity "deeply troubling".
If you can accept the blend of fact and fiction using a real person in a novel entails, this is entertaining stuff.
It's easy to imagine how a novelist might use a real person as a basis for a fictional character.
And if the spammers have used a real person's email address, you'll just be adding to the burden inflicted on some hapless bystander.
