The short answer is NO; multi-fuel stoves are not designed for it.:

Bituminous Coal, commonly called "Lump Coal" or "House Coal" is not suitable for multi-fuel stoves and it's use would probably invalidate the stove's warranty.

There are two main problems:

Bituminous coal burns with long flames which pass around the throat plate and play directly on the unprotected top of the stove with the likely result of a burned out throat plate and/or cracked top plate. Correct smokeless fuel burns with short flames which are contained within the protected firebox where they belong.

Bituminous coal also creates high volumes of soot which can block the throat plate and flue, causing fumes to be emitted into the room with potentially fatal results.

The only solid fuel suitable for multi-fuel stoves, is smokeless fuel. Your Stove Specialist will advise on the best fuel for a particular appliance. A good coal merchant should be able to advise but we do get reports of incorrect advice being given. There is an "Approved Coal Merchants Scheme" where you find your local qualified merchant.

Or better still, Burn Wood! Cleaner, Carbon-neutral, Sustainable & much more environmentally friendly!