What multi tool comes with a 11 speed chain tool?

not a multi but the park CT -6.3 IS COMPACT ENOUGH IMO

does the 11speed chain require a tool specific for it?

Any chain tool will break an 11spd chain. Pack an extra master link to get you back together.

For this any 9pls+ tool will work but for 11sp you will need 2 11 sp masterlinks.

I read from Sram that the PowerLock doesn't work with Shimano 8700 11 speed chains. To break a 11 speed chain you can use whatever but to insert the pin I believe a 11 speed chain tool is required. KMC ML11 link also doesn't work with the 8700. I haven't checked any other brand.

Ref to KMC, this was sent by them:

"The new X11SL x 116L chain is compatible with the Shimano 11 speed system. We have designed our chain so it can be compatible will all systems. For the MissingLink 11 as of right now it is only compatible with our chain and the campy 11 speed chain. As soon as we release an updated version compatible with all 11 speed chains we will update our website."

Yes and no. You can use a SRAM PowerLock link with a Shimano chain, but then that link should be replaced at the soonest opportunity. Quick links a la SRAM and KMC are so handy I shy away from Shimano chains altogether.