Azure AD B2B Direct Connect - giving access to Enterprise Apps / App Registrations

Greetings,

my company is looking to manage identity access for our webapp through Azure AD B2B. Currently we are doing B2B collaboration (inviting guest users), but now we are looking into using B2B Direct Connect by setting up cross-tenant communication with our client/partner. 

My question: Is it possible to give access to the webapp's Enterprise App in our directory to the client's accounts in their directory through B2B Direct Connect? Specifically, without inviting their users into our directory as guests but using the cross-tenant communication of B2B Direct Connect. 

Thanks in advance!