Disable Drive Mapping GPO when a user logs into a workstation in a particular subnet

We are running Windows 2008 R2 Native AD and use GPOs to map drives.  This works great, but now I've been asked by a user group to not map drives when they log into a workstation in a particular subnet. Is there any way to do this using GPMC? Or is there a registry hack to tell the workstation not to apply GPOs for every user logging into the workstation??
gobears1294Asked:
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brendanmeyerConnect With a Mentor Commented:
on each drive map, go to the common tab,
click Item Level Targeting
click  Targeting
New Item-> IP Address Range
type your IP range
click Item Options
select Is Not

You can add multiple ranges and have different options
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yo_beeDirector of Information TechnologyCommented:
Are you using Group Policy Preferences or logon script?

If you are using GPP just follow what  BrendanMeyer suggested.

If you are using logon scripts (Which at this point you probably should switch to GPP) you can use WMI Filtering.

Select * FROM Win32_IP4RouteTable WHERE Mask='255.255.255.0' AND Destination Like '192.168.10.%'
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gobears1294Author Commented:
Thanks brendanmeyer and yo_bee

I do use GPO preferences and I will take a look at the Item Level Targeting for each GPO.  I have over 50 drive mapping GPOs.  Do you know if there is a powershell command to configure this item?
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yo_beeConnect With a Mentor Director of Information TechnologyCommented:
Are you looking to consolidate your 50 GPO's into a single GPO leverage GPP w/ ILT?

I just looked and I do not see any commands to create GPP within GPO via Powershell.

There are cmdlets to create GPO's and set Reg values, but GPP is XML based.

You most likely will need to create each mapping 1 by 1.  
I had to do it for my 107 Printers.
:(

Sorry.
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gobears1294Author Commented:
Thanks to both brendanmeyer and yo_bee for their insight.  I'll be addressing this issue on a drive mapping by drive mapping basis.
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