You can always connect to the database with a different userid.
For example, if you have logon to Windows as Mickey you can connect to the database using CLP as Daisy and another one as Pluto. Each will have to be done on a separate CLP command line.
In one CLP command window you connect as Daisy:
c:\>db2 connect to sample user Daisy
In another CLP command window you connect as Pluto:
d:\>db2 connect to sample user Pluto
Regards,
Alvin.