Using multiple entityIDs with an IDP

[Markus Bott]

Hello,

i am pretty new to the whole Shibboleth Stuff and i have a question 
about multiple EntityIds with an IDP.
I added a new SP recently and added accordingly the Filters for the new 
SP (EntityID: 'https://sp.com/shib'). Now i got the notice that I need 
to be able to connect multiple IDP EntityIDs, lets call them 
'https://domain.com/shib1' and 'https://domain.com/test2' to the same SP.
I read that i can register more then one EntityID with my IDP Server 
(https://domain.com/shib1 and https://domain.com/shib2).
But i dont know how i can filter the incoming requests from the SP. Is 
there any possibility to filter the released attibutes, depending on the 
SP's EntityID and the requested IDPs EntityID. I want to release 
attibutes 'a and b' to the SP when the request is for 
'https://domain.com/shib1' and release 'a and c' to the same SP when the 
request is for 'https://domain.com/shib2'.
Thanks in advance for any help and ideas.

Greetings,
Markus