MInimum Purchase amount of specified Manufacturer

I sell goods from several manufacturers.

Is there a way of creating a coupon which will give x% off a certain manufacturer's items, as long as a certain value of that manufacturer's items are purchased.

This is not the same as the overall cart value, which may include non-discounted items from other manufacturers.

Hi, this is not currently in the softeware but is a good idea. Im moving this post to the suggestion box, and will implement in a future release. What I envision is a dropdown box next to the minimum value field that has the options of overall/specific. If specific, then the minimum value field only takes into account products from the category(s)/manufacturer(s)/product(s).. etc selected. Basically whatever is selected in function type 2.