Follow these steps,
  1. Type /sreq auto to enable autoget.
  2. Type /dcc trust on to make sure the list is enabled.
  3. Open the options dialog and click the "Trusted" button.
  4. Add the desired host(s) to the list.
  5. Check [x] Limit autoget to trusted users.
  6. Check [x] Show get dialog for non-trusted users.
  7. Close the options dialog.
Now, if everything worked as expected, you will automatically accept files from trusted users, while the DCC dialog will pop up for others.