I think my post was a bit misleading.
I don't use Bonding on Unraid. There I have just one single ethernet Interface.
I use bonding between my pc and the switch, so i can transfer things from/to my pc from different sources not limited to 1 gbit/s (in my case from Unraid and my Router).
And when I do this with Unraid(like copy one file with smb and do an internet download) the traffic from Unraid and the traffic from my Router are on the same link
But when use any other NAS Software like OMV, the internet traffic and nas traffic are on different links.(like it should be)