Form A has a list of users with details such as Name , Phone number  etc and includes the unique Loginuser.ID for each user record.

Form B is related and on load sets variables to show the current date, user id an so forth. How can I set the Name variable on Form B to correspond to the particular loginuser. ID. ? In other words retrieve the real name of the submitter for Form B.

I guess that it is a "Fetch records" problem but I cannot get it to work properly.