Please consider carefully whether you
want to create a new table for every user.
There certainly are ways of doing it (in SQL as PEB suggests or even using DoCmd.CopyObject()) but it is not an advisable way to go forward in your circumstances.
Consider, instead, adding the new user to a general purpose user table with an identifying key code.
CopyObject Method
The CopyObject method carries out the CopyObject action in Visual Basic.
expression.CopyObject(DestinationDatabase, NewName, SourceObjectType, SourceObjectName)
expression Required. An expression that returns one of the objects in the Applies To list.
DestinationDatabase Optional Variant. A string expression that's the valid path and file name for the database you want to copy the object into. To select the current database, leave this argument blank. Note: In a Microsoft Access project (.adp) you must leave the destinationdatabase argument blank. If you execute Visual Basic code containing the CopyObject method in a library database and leave this argument blank, Microsoft Access copies the object into the library database.
NewName Optional Variant. A string expression that's the new name for the object you want to copy. To use the same name if you are copying into another database, leave this argument blank.
SourceObjectType Optional AcObjectType.
AcObjectType can be one of these AcObjectType constants.
acDataAccessPage
acDefault default
acDiagram
acForm
acFunction
acMacro
acModule
acQuery
acReport
acServerView
acStoredProcedure
acTable
Note When using the CopyObject method with a data access page, a copy of the HTML file for the data access page is created in the Default database folder and a link to it is created in the destination database.
SourceObjectName Optional Variant. A string expression that's the valid name of an object of the type selected by the sourceobjecttype argument. If you run Visual Basic code containing the CopyObject method in a library database, Microsoft Access looks for the object with this name first in the library database, then in the current database.