Hi Denis,
You could use the Connect Operator for Offset Operators with multiple parallels, but in my opinion, it’s easier to use the Generator directly to place the posts in the desired positions using the Corner input. Please find attached sample scenes demonstrating two different setups: one with connected Offset Operators, and another where the Spline Operator in Divide Evenly mode divides the base spline, which is then Offset multiple times. I hope this helps.
Best regard,