Hi Tony,

you can use some jQuery code similar to this one below, it will do it. At the moment there isn't a way to do this by setting just a column option in the grid configuration, but it's on the list.

           $("#grid1").live("iggridrendered", function (event, args) {
                // right-justify text in the third column
                args.owner.element.find("tr td:nth-child(3)").css("text-align", "right"); // or "center"
            });

In the context of MVC, it could be declared like:

<asp:Content ID="Content2" ContentPlaceHolderID="MainContent" runat="server">
    <script type="text/javascript">
        $(document).ready(function () {
            $("#grid1").live("iggridrendered", function (event, args) {
                // right-justify text in the third column
                args.owner.element.find("tr td:nth-child(3)").css("text-align", "right");
            });

        });

    </script>
    <%= Html.Infragistics().Grid(Model).ID("grid1").Height("250px").Columns(column =>

// rest of the grid definition

Hope it helps,

Angel

All you need to do is hook up to the headerCellRendered event of the igGrid and in the handler consider the ui.columnKey param.
Thus you can apply the text justification only to the desired columns.

Here's a code sample of how to accomplish this:
(I'm attaching a working HTML page that illustrates the sample code) 

$("#Grid1").igGrid({
     autoGenerateColumns: false,
     dataSource: sourceData,
     primaryKey: "ProjectID",
     columns: [
        { key: "ProjectID", headerText: "Project Id", width: 100, dataType: "number" },
        { key: "Name", headerText: "Name", width: 200, dataType: "string" },
        { key: "StartDate", headerText: "Start Date", width: 150, dataType: "date" },
        { key: "EndDate", headerText: "End Date", width: 150, dataType: "date" },
        { key: "IsPostponed", headerText: "Is Postponed", width: 100, dataType: "bool" }
    ],
    headerCellRendered: function(evt, ui) {
        if(ui.columnKey === "Name" || ui.columnKey === "StartDate")
        {
            $(ui.th).css("text-align", "center");
        }
    }
});

Cheers!
Borislav 

Thus the proposed option will have a simplistic name, but its purpose will be ambiguous.
Having a custom class applied to the 3 type of cells can certainly be useful and I don't think that it's that hard to accomplish using JavaScript and the grid's event(s).

However if you feel that the idea for the property is a-OK, go ahead and use Feature Request form to submit it to our developers.

Cheers! 
Borislav