No, although you could do that if you wished.
Best way to show it is to draw yourself a few different shapes in different colours and make a note of the order in which you drew them. Now send them to Signcut.
On the right hand toolbar you will see that the first shape you drew is the top one of the coloured squares, the second you drew is the second one of the coloured squares - and so on. Now either use preview or actually cut them (don't choose any of the colours, just send the whole lot to cut) The top colour will cut first, and this is the one you drew first in Inkscape, second colour will cut second and so on.
But if you didn't draw the shapes in the order you want them to cut, you can alter it. There is a set of four icons in Inkscape that let you alter the order (it is like layers, but mini layers cos they are all still on the same layer in Inkscape)
order.jpg
Hover over each of these when you have a shape selected and you will see what it does to the order
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