Able to limit certain tasks/milestones to be viewable to different external contractors?

Able to limit certain tasks/milestones to be viewable to different external contractors?

We are the developer of a number of construction projects and are hoping to use Zoho Projects to manage our schedule and share information. However, we have a number of vendors and contractors for every project and much of the information we wish to share is sensitive between different contractors.

Is there a way to limit what each external contractor sees?
Can we assign certain tasks or milestones to particular users or external clients, without giving access to the entire project?

I have noticed that you can set external milestones, however, ANYONE external can see all external milestones. We have numerous external contractors and each need to be limited to view only the tasks pertaining to them.

Is there a way to achieve this, or is there an update upcoming to help provide for these issues?

Thanks,

Carl