restrict access to shared folder

Hi all

The user in my app. scan papers  and put them in in specific folder on the Domain and save the path of this photo on DB

this folder has privilege read and write for this user

say this folder is \\172.25.28.7\shared

when user double click on  the path this display the photo

if for any reason the -server is off of example- the message appears - as no file found  in \\172.25.28.7\shared\abc.tif

make the user to know where the photo is saved

thus he can run from start \\172.25.28.7\shared and delete or modify files

are there any way to restrict the access of this folder only from PB app not from browser??

regards

ahmed