Baggies boss Steve Clarke has already said he would be happy for Dorrans to stay until at least the summer.
Foster echoed those sentiments and said: "Everyone wants Graham to stay. You just look at him in training, he's so silky smooth, he's a proper footballer. Everyone of the lads wants him to stay.
"I am sure the gaffer wants him to as well. That's maybe why he's started the last few games. Hopefully if he does get a run of games, it might persuade him to stay and change his mind.
"It's up to him, he's from up north and, if he is not settled, it is fair dos."