Toulouse coach Alain Casanova is frustrated by the prospect of losing Moussa Sissoko on a free transfer this summer.
The midfielder, 23, has spent his entire career with the Tefece but is out of contract at the end of this season.
Talks over a new deal this season and last have failed to produce an agreement and Casanova has called for a change in the laws.
"Le club have made him offers and, if he does not accept them, we cannot do anything," he said.
"President (Olivier) Sadran has done all he could to keep him, for 18 months now. I find it strange that players developed by a club can, of their own volition, leave for nothing.
"There needs to be a regulation which instigates a minimum payment to a player's formative club if he leaves."
Sissoko, who has been with Toulouse since 2005, is a reported target for Premier League outfits Newcastle and Sunderland, as well as Ligue 1 title chasers Marseille and ambitious Ligue 2 side Monaco.
The 25-year-old, who was on the Saints' bench against Chelsea in the 2-2 draw on Wednesday night, began his career at Exeter before moving to St Mary's.
He spent time with Championship club Charlton this season, where he made seven appearances - the last of which came on Boxing Day.
"Dan is a player we have always liked and we have been aware of him since his days at Exeter," Eddie Howe told the Daily Echo.
"He is a left-sided defender, he is very experienced and is a leader. He is composed on the ball and good in the air and has all the attributes that we look for in a player.
"We certainly feel we need defensive cover and he can operate at left-back as well. It is a signing that boosts our numbers defensively and adds competition for the squad."
Seaborne trained with Bournemouth on Thursday and could come into the squad for their trip to Walsall on Saturday.
A deal is believed to have been agreed between the two clubs and Spillane is now in the process of finalising personal terms, with an agreement expected to be completed before the weekend.
Spillane has been an integral part of Dagenham's side this season, making 27 starts and scoring five goals, although he has not made an appearance since the 3-1 defeat at Northampton on New Year's Day.
Daggers boss John Still is understood to be keen on an unnamed youngster at Birmingham as his replacement.