Hi Arouba
Routing lookup will be perfromed based on the souce interface. if the source interface is bind to a user defined routing-instance, the defination mention in those routing instance will be used.
set routing-instances Main-VR instance-type virtual-router
set routing-instances Main-VR interface reth0.0
set routing-instances Main-VR routing-options static route 10.80.90.0/27 next-hop 10.80.90.40
All those traffic that will arrive to srx interface other then reth0.0 use global defination.
routing-options static route 10.62.170.190/32 next-hop 10.80.93.1
routing-options static route 10.62.170.0/24 next-hop 10.80.93.1
routing-options static route 10.61.105.0/26 next-hop 10.80.93.1
routing-options static route 10.66.65.103/32 next-hop 10.80.93.1