Max Quantity Cart Question

[MobileITnz]

I have a project that this could be amazing with but was wondering how we would implement the following:

• We would like to limit purchases to 1 item per 28 days (this should be easy enough)

Ultimately we would also like to set limits based on supplier or category (whichever is easier)

• This limit only applies to a specific supplier (Say Supplier ID: 1) and supplier ID: 2 wouldn't have any limitation
  or
• This limit only applies to particular categories (I.E. Laptops, Tablets, Monitors)

Whichever way is easier to implement..

Any assistance would be great :) thank you in advance.