How can I display only the target user's profile on the touch panel of iX1600/iX1500?

You can change the method for displaying profiles in the touch panel settings.
Check [Preparation] and [Procedure] below.

[Preparation]

• Update the firmware of your ScanSnap to the latest version.
  For details about the update procedure, refer to here.
  
  
• Update ScanSnap Home to the latest version.
  For details about the update procedure, refer to here.
  
  
• Tap the gear icon in the upper right corner of the touch panel. Select [Access point connection] or [Direct connection] on the [Wi-Fi settings] - [Wi-Fi connect mode] screen that appears and configure the settings.

[Procedure]

1. Tap the gear icon to open the [Settings] screen.
   
   
   
2. Tap [Scanner settings].
   
   
   
3. Tap [Display of profiles].
   
   
   
4. Tap [All users].
   
   
   
5. Select [Selected user].
   
   
   
6. Tap the home icon.
   
   
   
7. When the following message appears, tap [Yes].
   Note: The profile list on the touch panel and the history records of computers that have been connected to ScanSnap will be initialized.
   
   
   
8. Connect a computer to the ScanSnap.
   
   
9. The touch panel shows only the profiles that are currently displayed in ScanSnap Home on the connected computer.
   
   
10. By connecting ScanSnap to multiple computers, a user icon appears in the upper left corner of the touch panel. Tap the icon to display the [Selecting a User] window. You can select a user name to change the computer you want to connect to.
    
    
    

For details about how to display profiles, refer to here.