Not really. Luxor uses a simple “current state” model, rather than have keywords for transformations in every function. But you can easily add a helper function of your own:
svgplace(svg, pos; scalefactor = 1) = @layer begin
scale(scalefactor)
placeimage(svg, pos)
end
@draw begin
svgplace(svgimg, O, scalefactor=0.1)
svgplace(svgimg, Point(100, 100), scalefactor=0.5)
end