PPPOE /29 for wireless clients

Hi, first time posting on the forums, unsure if its been answered or not, hopefully someone will be able to help out. Got the following setup, one RB2011UAS-RM, a switch connected to ether2 for lan access.

ether1-gateway - pppoe client for adsl service
ether2 - connects to LAN
ether3 - inactive
ether4 - inactive
ether5-dmz - /29 network
ether6-master - 100MB port for /29 network
ether7-10 - slaves for ether6

ether2 - 192.168.10.1
ether5 - 111.222.111.111, network 111.222.111.110

pppoe server setup to dish out 3 addresses
.114 - .116

.112 - local mail and web server
.113 - unused so far

Can get a pppoe client to route to internet, but cannot get firewall rule to block traffic from pppoe client to lan

routes
192.168.10.0/24 - pppoe-out1 nat connection for internal lan
111.222.111.110/29 - ether5-dmz 9
111.222.111.110 - ether-dmz (added automatically as soon as i add the address to the nic)

Basically i want to allow traffic from my lan to the dmz, but the dmz should not be able to access the lan unless initiated from the lan
Its not a true dmz, im just using that as an example
DMZ wireless clients need to pppoe into the network and get internet access, which i can get. just cant stop them getting to my lan

cheers in advance

To control whether specific traffic is forwarded by the router you need filters in the forward chain. See the link below:

http://wiki.mikrotik.com/wiki/Manual:IP/Firewall/Filter