Yes it can be done and is quite frequently. Will it work out, can't say, maybe.
I have heard this same question asked over and over. I have looked for answers and came across many examples of why not to mix species and may who have been successful. I would not mix species but that is must my opinion. If you do decide to go ahead keep them at a distance and run activated charcoal. Since you asked...
I have more but don't wish to start a debate, just passing along information I have come across. Good Luck
coppied from ultimatereef.net
MIXING ANEMONES
The fascination for keeping anemones can become so much that you may want to add another to your aquarium. As you have read above, anemones contain stinging cells, and in addition to facilitating feeding they are also used for protection - against predators and also other organisms that may want to pinch their prime location! This can sometime be born out in the aquarium when the keeper introduces another anemone.
One anemone may discharge nematocysts in order to "fight off" another anemone at distance. This can be loosely termed as allelopathy. This allelopathy can result in the burning of corals, and stinging of other anemones in the aquarium. Hence, it is not uncommon for an anemone a keeper has previously keep alive and healthy for months/years, to suddenly decline when a new anemone is introduced.
Broadly speaking, one should be OK keeping multiple numbers of the same species, and difficulty only arrives when differing species share the aquarium. One must bear in mind the potency of one species nematocysts against the other. Unless you have experience of this, then before you attempt to keep two species together, you should obtain advice from others who have experience (why not post here!).
Generally, one can reduce the impact of allelopathy by running activated carbon and promoting heavy skimming.
