203 - Wie kann ich steuern, wer ISP benutzen darf?

Under Unix by an entry in dsm.sys, under Windows in dsm.opt:

users maier mueller schneider

Thorugh that the access to ISP will be restricted to the users "maier", "mueller" and "schneider". Analog to this you can also enter groups, see manual.
If such an entry is missing, every user of the workstation can use ISP for his files.