How to hide and show Omniportlet based on user privileges

hi all
I am trying to hide or show an Omniportlet based on user privileges, which means accessc control on portlet-level for Omniportlet. But I couldnt find out how to do it.
According to Portal Developer's Guide:
You can hide and show portlets built with Web Clipping and OmniPortlet on portal pages dynamically by using security managers. Although Web Clipping and OmniPortlet do not expose security managers through the user interface, you can apply them by editing their XML provider definition file.
Question is: where can I find that XML file? Is this file accessible and configurable somewhere through Portal Enterprise Mgr?

Hi,
I don't think you can edit this file through Enterprise Manager. Atleast as far as I know. But its available on the server. I have a NT installation and I found it under:
D:\oracle\Mid_tier\j2ee\OC4J_Portal\applications\portalTools\omniPortlet\WEB-INF\providers\omniPortlet
You might want to restart the Portal application through OEM after you change this file.
Hope this helps,

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