RFC Sender and Mandant

Hello,

I have a understanding question:

In the RFC-sender-channel's configuration I need to specify the r/3 mandant.

Does this mean:

1. when the given user to login R/3 from xi (the one from the channel's config) is in mandant 100

and

2. In R/3 I test the rfc using a account in mandant 400

Then the RFC-Call won't reach the comm channel.

Is this correct?