Inbound policy on PE router.

prefix-set CUSTOMER_A
  10.0.0.0/19 le 24
end-set
!
community-set COMM_90
  100:90
end-set
!
community-set COMM_100
  100:100
end-set
!
community-set COMM_110
  100:110
end-set
!
route-policy CUSTOMER_IN
  if community matches-any COMM_90 and destination in CUSTOMER_A then
    set local-preference 90
  endif
  if community matches-any COMM_100 and destination in CUSTOMER_A then
    set local-preference 100
  endif
  if community matches-any COMM_110 and destination in CUSTOMER_A then
    set local-preference 110
  endif
  if destination in CUSTOMER_A then
    pass
  endif
end-policy
!