Iis it possible to capture the vlan interface's pppoe packets in bridge nat rule

for example:

/interface bridge
add name=wan 
/interface vlan
add interface=wan name=vlan100 vlan-id=100
/interface bridge port
add bridge=wan interface=ether2
/interface pppoe-client
add name=pppoe-out1 user=test password=test interface=vlan100
/interface bridge nat
add action=log chain=srcnat disabled=no mac-protocol=vlan out-bridge=wan

in this case, the nat rule can capture the packet, and in the log shows: vlan-id 100, eth-proto 8864 and etc.
but if i change the rule to
add action=log chain=srcnat disabled=no mac-protocol=pppoe out-bridge=wan
then nothing can be captured.

So i want to know is it possible to capture the vlan interface’s pppoe packets in bridge nat rule.

Routeros version: 6.41.3 x86
Thanks.