We can attempt it. Basically, we'd be trying to find some sort of process server to deliver it to assure the committee that they had indeed received the summons, but the person could completely ignore it. There is no enforceable mechanism whereby Canada's Parliament can compel someone to appear at committee. They have to be within Canada. That's where the privileges and powers of the committee and Parliament extend.
On February 28th, 2023. See this statement in context.