How to mark checkboxs generated by loop without ID?

Im going to do my best to describe my issue, its hard to put into words.

On my page, I have a textbox and a button. I type a users name in the textbox and click the button to bring back all the users information.

Below this, I have a table being generated by a foreach loop of every role in my database that the user could possibly be in, with a 2 checkboxs next to it. The roles and textbox display even before the button is clicked.

When the users information comes back, whichever roles the user is in, I need to check those boxes.

It seems easy enough, I am just having a hard time trying to figure out how I am going to target each specific checkbox, because they are being created in a loop, not allowing me to give them specific ID's.

<table border="1" id="ApplicationRoles">
            <thead>
                <tr>
                    <th style="text-align:center" width="300">Role</th>
                    <th style="text-align:center" width="300">Category 1</th>
                    <th style="text-align:center" width="300">Category 2</th>
                </tr>
            </thead>
            <tbody>

                @foreach (var role in Model.appRoles)
                {
                   <tr>
                        <td>
                            @Html.DisplayFor(modelItem => role.Name)
                        </td>
                        <td>

                            <input type="checkbox"  />

                        </td>
                        <td>
                            <input type="checkbox" />

                    </tr>
                }
            </tbody>
        </table>

Using javascript, I can check to see what roles the user is in, but how can I target a specific checkbox to check it(saying the user is in this role), without being able to give each one an ID?