public class ExceptPropertiesAttribute : ActionFilterAttribute
{
    private IEnumerable<string> _propertiesKeys;

    public ExceptPropertiesAttribute(string commaSeperatedPropertiesKeys)
    {
        if (!string.IsNullOrEmpty(commaSeperatedPropertiesKeys))
        {
            this._propertiesKeys = commaSeperatedPropertiesKeys.Split(',');
        }
    }

    public override void OnActionExecuting(ActionExecutingContext actionContext)
    {
        if (this._propertiesKeys != null)
        {
            foreach (var propertyKey in this._propertiesKeys)
            {
                if (actionContext.ModelState.ContainsKey(propertyKey))
                {
                    actionContext.ModelState.Remove(propertyKey);
                }
            }
        }
    }
}

[ExceptPropertiesAttribute("Id")]
public ActionResult Post([FromBody] MyModelDTO itemDTO)
{
    //code
}

public ActionResult Put([FromBody] MyModelDTO itemDTO)
{
    //code
}