client/customer additional info in account login.

Hi All,
any assistance greatly appreciated please.
Does anyone know what plugin for WP i can use that allows my customer to add additional information to there account once logged in? for example: customer signs up on my site, then proceeds to his account page, he then needs to add a record from a predetermined drop-down (almost like an asset/inventory list) and fill in a serial number. If he requires an additional item, he follows the process and adds a new item to his account, followed by a serial number and so on. So if he eventually has 5 items, they are visible only to him in his account login page.
please help or offer suggestions if this is possible many thanks