Hi Daniel,
I believe you can use "show ipstats vlan " to get the # of IN/OUT packets/Mcast/Bcast inside the vlan. This is not the same, but it's similar.
Output example:  
show ipstats vlan "server"
Router Interface server
     inet 192.168.100.100 netmask 255.255.255.0 broadcast 192.168.100.255
     Stats:  IN         OUT
             14          14 packets
            448         448 octets
             14          14 Mcast pkts
              0           0 Bcast pkts
              0           0 errors
              0           0 discards
              0             unknown protos