No. Assuming your desired values can't be derived from some maths formula, the way to do it would be to map the slider value to a memory array containing the actual values, something like this...
Code:
slider1:0<0,9,1>Value
@init
vals = 0; // set the address of the array
vals[0] = 1;
vals[1] = 2;
vals[3] = 3;
vals[4] = 5;
vals[5] = 10;
vals[6] = 20;
vals[7] = 45;
vals[8] = 79;
vals[9] = 100;
@slider
slider1 = floor(min(max(slider1, 0), 9)); // clamp to prevent bad index
value = vals[slider1];
...but of course the slider will still read 0-9. If that's not acceptable then you'd have to make a custom GUI.
edit: doh! forgot that you can make sliders into dropdowns so you can do
Code:
slider1:0<0,9{1,2,3,5,10,20,45,79,100}>Value