Grid Template Field Visibility

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C#

ASP.NET

<asp:GridView ID="grdFeedback" runat="server" AutoGenerateColumns="False"
                               Width="468px" CellPadding="4" ForeColor="#333333"
                                   GridLines="None" onrowcommand="grdFeedback_RowCommand"
                                   onrowdatabound="grdFeedback_RowDataBound"
                                   Height="63px" onrowcreated="grdFeedback_RowCreated">
                                   <RowStyle BackColor="#EFF3FB" />
                                   <Columns>
                                       <asp:BoundField DataField="strFedback" HeaderText="Feedback" />
                                       <asp:BoundField DataField="strFedbackSender" HeaderText="Time" />
                                       <asp:BoundField DataField="strFedbackDate" HeaderText="Date" />
                                       <asp:BoundField DataField="strFedbackTime" HeaderText="Sender" />
                                       <asp:TemplateField HeaderText="Operation">
                                           <ItemTemplate>
                                               <asp:LinkButton ID="Lnk_Delete" runat="server"
                                                   CommandArgument='<%# Eval("iFedbackid") %>' CommandName="del"
                                                   onclick="Lnk_Delete_Click">Delete</asp:LinkButton>
                                           </ItemTemplate>
                                       </asp:TemplateField>
                                   </Columns>
                                   <FooterStyle BackColor="#507CD1" Font-Bold="True" ForeColor="White" />
                                   <PagerStyle BackColor="#2461BF" ForeColor="White" HorizontalAlign="Center" />
                                   <EmptyDataTemplate>
                                       <asp:LinkButton ID="Lnk_Delete0" runat="server">Delete</asp:LinkButton>
                                   </EmptyDataTemplate>
                                   <SelectedRowStyle BackColor="#D1DDF1" Font-Bold="True" ForeColor="#333333" />
                                   <HeaderStyle BackColor="#507CD1" Font-Bold="True" ForeColor="White" />
                                   <EditRowStyle BackColor="#2461BF" />
                                   <AlternatingRowStyle BackColor="White" />
                               </asp:GridView>

This is my gridview for filing feedback from users. There is a template field Link button
(Lnk_Delete). Am finding it difficult to display this link button corresponding only to
the user who has posted the feedback..
Pls help me out ...