Exact match using select menus

I want to do a exact match with multi filter select (using select menus). This is what I've tried:

                "aoColumns": [
                    null,
                    null,
                    null,
                    null,
                    null,
                    { "sType": "file-size" },
                    { bRegex: false, bSmart: false },
                    null
                ]

As you can see, the column number is 7 where I want to do a exact match.

For a live example, see here:
http://www.datatables.net/examples/api/multi_filter_select.html

Try select the hyphen character (-), then it also matches:

Win 95+ / Mac OS 8.6-9.2
Mac OS 8-9
Mac OS 7.6-9
Mac OS 8-X

I want to only match - and not the other ones. Is this possible?

Thanks in advance.