Here's an example from one of my lab filers (edited for content, obviously).
C:\Program Files (x86)\PuTTY>plink <username>@<filername> -pw <password> "cifs shares" | findstr web
web /vol/web
So you can see, it only printed lines that had the string "web" in it.
Now, a much better way to do this is with the Data ONTAP PowerShell Toolkit, using very basic PowerShell skills you can get the same results without having to leverage PLink.
PS C:\Users\myuser> Get-NaCifsShare | Where {$_.MountPoint -eq "/vol/web"}
MountPoint ShareName Description
---------- --------- -----------
/vol/web web