How to I hide some link based on the type of user that I'm login.

I have a set of link that I will have to hide based on my window authentication. How do I do this? These link are from my grid. I will like to hide them if I'm a user x or show them if I'm a user y.

   @Html.ActionLink("Edit", "Edit", new { id=item.RecordID }) |
                        @Html.ActionLink("Details", "Details", new { id=item.RecordID }) |
                        @Html.ActionLink("Delete", "Delete", new { id=item.RecordID })

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I use this for my window Authentication

[Authorize(Users = @"xxx/xx")]
Under my controler