How to restrict access to specific functions by project type?

Hi,

I want to interface projects from a third party system to Oracle Projects. The plan is that these projects
will be interfaced with a specific project type.

As the requirement is the third party system to be the source system for the projects definition changes for
these projects in Oracle Projects will be restricted to modify information not maintained in the third party
system such us Project Classifications.

I am aware that using the Function Security in Oracle Projects is possible to restrict a specific responsibility
via menu exclusion determined functions (example: update tasks).

But as I want to restrict the functions only for a specific project type, the functionality doesn't seem to fit