Content type for user role assignment or other criteria

I would like to create a content type with a view that will allow users to create and subscribe to an instance of the content type according to their role (og membership) and/or any other criteria.
for example consider the 'Software Project' content type that will be created and set up to get started iff there are two PHP programmers and one OA persons subscribed to the instance, and if there are founders of the amount of 1000$.
I know how to set up the content type fields and how to create the view with general search using the wonderful views interface, but I do not know how to set up the search so it will provide results to match each user role, so a PHP person will search only projects that require a PHP person and there is at least one that is not already assigned. the same for the scalar property of the founding.
I googled a bit but I could not fined any way to assign roles for content types and I do not know if there is any way I can define a field in a content type that is accumulating results from users.

I will appreciate any suggestion and ideas as I am kind of new to Drupal and do not really know PHP (but I am willing to try :-).
I need it for other type of projects that require collaboration but i found the need more general, it can fit for open source projects such as Drupal as well.

Thanks allot,
Moshe Beeri.