You need to modify the FMC policy to modify the accepted queue as the Tx FQ of another Ethernet port.
For example,
<distribution name="hash_ipv4_src_dst_dist0">
<!-- frame match rule -->
<key>
<fieldref name="ipv4.src"/>
<fieldref name="ipv4.dst"/>
</key>
<!-- frame handling rule -->
<queue count="1" base="Tx FQID"/>
</distribution>
Each MAC has its own TX FQ, you could get this information from debugfs