How to Dial Multiple PPPOE Client Over Single WAN Interface?

RouterOS General
1

I got 2 ports on my Router
1xWAN port & 1xLAN Port
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I need to dial 2 pppoe client over a single WAN Interface
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I failed to do so as the both pppoe client can’t dial at the same time
How to Dial Multiple PPPOE Client Over Single WAN Interface?