I thought you could, but aint really sure.

You can Perplex up your damage by +3.

When you target multiple characters, after you roll to hit you divide the damage among characters struck.

So if you were using V Hawkeye and wanted to use a multi-target attack and perplex you would first Perplex up his damage to a maximum of 6 (3 base damage + 3 perplexers).

Then you choose up to 3 targets and roll the bones.

Say you struck only 2 figures and missed the third, you would then divide the 6 clicks of damage as you wanted between the two successfully struck figures:

6 and 0
5 and 1
4 and 2
3 and 3

Hope that answers your question...