Can this functionality be achieved through Specialization rules?

Hi,

We have a custom concurrent program(say, CP1) , which spawns 4 standard programs during its execution. Since CP1 is executed simultaneously (approx 25 at a time), the total standard programs that effectively get submitted are (approx) 25x4=100.

Since these many requests will block the Standard Manager, we decided to create a Custom Manager to take this load. We want to create the custom manager such that, ONLY when the 4 standard programs are called by the custom program CP1 they should run through this custom manager. In all other scenarios they should run through Standard Manager (which is their default behavior)

I tried to figure out if this is possible through Specialization Rules, but could not come up with an answer. Does anyone have idea if this is achievable ?