Protein values of up to 4.0 g/kg body weight are common in weight training and bodybuilding. Such massive amounts have never been based on research, nor are they recommended in reputable sources.
Depending on the source and various studies, protein intake amounts of 1.4-3.3 g/kg body weight are given for people of normal weight who want to build muscle mass. Sports science institutions usually recommend a protein intake of 1.3-1.8 g/kg body weight for adults who train intensively  . With intakes of more than 2.6 g/kg body weight, no additional muscle growth was detected, but fat gain could be reduced with a high-calorie diet (mass phase/bulking)  .
If, for certain reasons, the total energy intake is reduced (calorie deficit), a proportionally increased protein intake of 1.8-2.7 g/kg body weight is recommended (see also "Definition & Diet" or "Weight reduction").
 Hot Topic Protein in Sport Version 3.1 , ed. by Swiss Sports Nutrition Society
 Leaf A, Antonio J. The Effects of Overfeeding on Body Composition: The Role of Macronutrient Composition - A Narrative Review . Int J Exerc Sci . (2017)
 Antonio J, et al. A high protein diet (3.4 g/kg/d) combined with a heavy resistance training program improves body composition in healthy trained men and women--a follow-up investigation . J Int Soc Sports Nutr . (2015)