Labeling a Checkbox Within a Table

I am building a site where accessibility is a concern. I've been given a table similar to the one below.

enter image description here

I am wondering what the best way is to provide a label for the checkbox. My initial thought was to do something along these lines, but I'm not sure if it is correct:

  <tr>
    <td><input type="checkbox" aria-labelledby="username1 company1 address1"></input></td>
    <td id="username1">John Doe</td>
    <td id="company1">ACME CO</td>
    <td id="address1">12345 Main Street, Chicago, IL 12345</td>
    <td><select name="usertype" id="1">
      <option value="1">User</option>
      <option value="2">Admin</option>
      <option value="3">Inactive</option>
      <option value="4">...</option>
    </select></td>
  </tr>
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