|You sure can, how you do it is going to depend on whether the users already exist, if they are local users or domain users, and whether your trying to add them to the computer that's running the script or add them to a list of computers remotely. |
This is something I put together in the past to add a single user to the local administrator group on a large list of servers and should get you pointed in the right direction.
for /f %%A in (servers.txt) do (
psexec \\%%A net localgroup administrators /add "pacific-1\%duser%"
IF !ERRORLEVEL! NEQ 0 Echo %%A >>errors.txt
The key to getting this done (and what's going to change dependant on whether its running on the machine or against a remote machine) is the net localgroup administrators /add command.