Let’s say you have a control on your page that you want only a certain group of users to see. Fortunately, SharePoint has a built-in control that lets you hide controls to which users do not have the necessary permissions.  This control is the SPSecurityTrimmedControl.

<Sharepoint:SPSecurityTrimmedControl runat=”server” Permissions=”ManageLists”>
Place your control(s) here
</SharePoint:SPSecurityTrimmedControl>

All you have to do is wrap your control with this security control and set the correct permissions in the Permissions attribute. The Permissions attribute, when used in Visual Studio or Designer, will have intellisense.  Whatever permissions you specify will be required by the user in order to view the control(s) inside of the SPSecurityTrimmedControl:

EmptyMask
Has no permissions on the Web site. Not available through the user interface.

ViewListItems
View items in lists, documents in document libraries, and view Web discussion comments.

AddListItems
Add items to lists, add documents to document libraries, and add Web discussion comments.

EditListItems
Edit items in lists, edit documents in document libraries, edit Web discussion comments in documents, and customize Web Part Pages in document libraries.

DeleteListItems
Delete items from a list, documents from a document library, and Web discussion comments in documents.

ApproveItems
Approve a minor version of a list item or document.

OpenItems
View the source of documents with server-side file handlers.

ViewVersions
View past versions of a list item or document.

DeleteVersions
Delete past versions of a list item or document.

CancelCheckout
Discard or check in a document which is checked out to another user.

ManagePersonalViews
Create, change, and delete personal views of lists.

ManageLists
Create and delete lists, add or remove columns in a list, and add or remove public views of a list.

ViewFormPages
View forms, views, and application pages, and enumerate lists.

Open
Allow users to open a Web site, list, or folder to access items inside that container.

ViewPages
View pages in a Web site.

AddAndCustomizePages
Add, change, or delete HTML pages or Web Part Pages, and edit the Web site using a SharePoint Foundation–compatible editor.

ApplyThemeAndBorder
Apply a theme or borders to the entire Web site.

ApplyStyleSheets
Apply a style sheet (.css file) to the Web site.

ViewUsageData
View reports on Web site usage.

CreateSSCSite
Create a Web site using Self-Service Site Creation.

ManageSubwebs
Create subsites such as team sites, Meeting Workspace sites, and Document Workspace sites.

CreateGroups
Create a group of users that can be used anywhere within the site collection.

ManagePermissions
Create and change permission levels on the Web site and assign permissions to users and groups.

BrowseDirectories
Enumerate files and folders in a Web site using Microsoft Office SharePoint Designer 2007 and WebDAV interfaces.

BrowseUserInfo
View information about users of the Web site.

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