Mike,
Not only possible, very easy too! Use the form's Close event to run this
line of code:
DoCmd.DeleteObject acTable, "YourTableNameHere"
Just make sure you compact your database regularly, creating and
deleting tables results in high database bloat. If this is a single user
database, using the Compact on Close option (Tools > Options, General
tab) will do the job just fine.
HTH,
Nikos