Content Access + ACL Assign User Permission

Thanks for the module! I have installed Content Access + ACL and found that Content Access only lets me give permission to a node one user at a time. Is there a way to give permisson to a block of users with Content Access as I plan to have many users that need different permissions set to nodes as they get published over time.

Here's more background to why I ask for this feature: On my site I need to sell a digital magazine so that paid subscribers can download a digital copy of their magazine every two weeks when a new issue is published (but not have access to back-issues that fall outside their subscription). I have set up a test site to achieve this where I have created for every issue of the magazine a node and attached a file (the magazine) to the node and then I use Content Access to restrict access to a user role. When a new issue is published I create a new node as described and also a new user role and then assign the user role to the group of users that are the current subscribers (i.e. that have the user role 'current subscriber' active, this 'current subscriber' role can be purchased as an Ubercart product). This works great with Content Access but I will have a large number of user roles very soon which I would like to avoid and instead give permission directly to users (instead of roles) by using Content Access +ACL. Is this already possible or could be a future feature?