If you want to show a certain form to a limited number of people, you can use the passcode option. The following are the steps to use this Passcode feature.
Drag the Text block and name it Passcode or Password whatever you want.
Put the condition on the section which you want to show to certain people that it will appear only if a particular expression (passcode) is entered in the Passcode column, And use any passcode of your choice as shown below
Now, if someone enters the correct passcode (Here it is Clap@123) then only the section will appear else it will be hidden as shown