why there is difference for the same acl on the AR router and NE05

I noticed some interesting thing.

the acl configured on the ar router is as below:

acl name ctrl-vty 3000

         rule 5 permit ip source 10.1.10.0 0.0.0.255

         rule 10 permit ip source 10.1.20.0 0.0.0.255

while on the NE05, the configuration is not same as on the ar router, it’s configured as below:

acl name ctrl-vty 3000

         rule 5 permit ip source 10.1.10.0 0.0.0.255 vpn-instance MGMT

         rule 10 permit ip source 10.1.20.0 0.0.0.255 vpn-instance MGMT

as you guys can see, there is additive vpn-instance at the end of the rule on NE05, what is the difference between these two rules?