Yes, Microsoft’s access database does multivalues. Well, sort of.

Multivalues are only available within MS-Access 2007 and beyond and it is really all to do with MS-Sharepoint; the ability to link or select from a sharepoint field.

Microsoft have provided an intro page  – http://office.microsoft.com/en-us/access-help/guide-to-multivalued-fields-HA001233722.aspx, but more importantly is the use of multivalues within queries – http://office.microsoft.com/en-us/access-help/using-multivalued-fields-in-queries-HA010149297.aspx.