Is drupal able to assign a node to a user ?

Hello,

I am considering drupal for a project with following features :

I need two content types : A supplier content type and a client content type.

I want my clients to be able to follow the progress of their orders (each order will be a node)
And my suppliers will have access to their invoices/documents etc.. (nodes as well)

Any ideas on how to achieve this ?

Example :
Client Alpha will have access to node/34 and node/46 only.

Supplier Beta will have access to node/38 and node/50 and their attached files only
And so on ...

Is this possible with drupal ? How ?