There is a utility module from Xaoc called Samara, the scan mode will switch through three inputs when a fourth signal crosses the threshold (-1 to +1, +1 to +3, +3 above). But it sounds like you want to multiply a signal and invert one copy so your two destinations mirror one another. In which case, look into Invert, Polarizer, Offset modules and if you only need on/off (0% to 100%) see Gate Logic like NOT.