All versions of Sonar can use VST, VSTi, DX and DXi plugin effects. So, yes, you can use it.
If its a VST, and I'm 99.9898% it is, just install it on your PC to a folder location, like your Soanr X3 vst folder, then open sonar and run the VST scan to that folder location and WHAW LAH!, you can use it
CJ