ip address and instagram info from legends who understand how ip and proxy works

[MrIrtazaOnline]

Hi, I want to manage my USA client Instagram account from other country?    
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Is it possible that I can run his account on his IP address.

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Like if I ask him his home IP address and add it to my browser. Would it work? 

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Currently I am thinking of buying a proxy of USA and use that for managing his account. But if I can use directly his ip that would be great.... Please help 

Edited by MrIrtazaOnline, 07 January 2020 - 07:28 PM.