Hi,
1. The first step is to create a copy of web part and controls which are used by this web part.
2. Then you can make following changes in copy of control:
c:\<project>60\CMSModules\Membership\FormControls\Users\SelectUser.ascx.csin the metho SetepControls() you need to register following event:
 usUsers.OnAdditionalDataBound += new CMSAdminControls_UI_UniSelector_UniSelector.AdditionalDataBoundEventHandler(usUsers_OnAdditionalDataBound);
Then in its implementation call:
 object usUsers_OnAdditionalDataBound(object sender, string sourceName, object parameter, string value)
    {
        switch (sourceName.ToLowerInvariant())
        {
            case "itemname":
              {
                    DataRowView drv = (parameter as DataRowView);
                    // Get item ID
                    string itemID = drv[ReturnColumnName].ToString();
                    // Get item name
                    string itemName = GetItemName(drv.Row);
                    if (Enabled)
                    {
                        val = "<div class=\"SelectableItem\" onclick=\"US_ProcessItem('" + ClientID + "', '" + ValuesSeparator + "', document.getElementById('chk" + checkBoxClass + "_" + ScriptHelper.GetString(itemID).Trim('\'') + "'), true); return false;\">" + HTMLHelper.HTMLEncode(TextHelper.LimitLength(itemName, 100)) + "</div>";
                    }
                    else
                    {
                        val = "<div>" + HTMLHelper.HTMLEncode(TextHelper.LimitLength(itemName, 100)) + "</div>";
                    }
                    break;
                }
  return "EEE";                
        }
        return value;
    }
To see the change replace above method with the below one as a test:
  object usUsers_OnAdditionalDataBound(object sender, string sourceName, object parameter, string value)
    {
        switch (sourceName.ToLowerInvariant())
        {
            case "itemname":
                return "EEE";                
        }
        return value;
    }
In the code above you can generate the link to the edit page instead of string "EEE".
Best regards,
Ivana Tomanickova