A series of potential deals, including the Lions and Fremantle's discussions around Mitch Clark, are being held up by the Giants' 17-year-old mini-draft, which takes place next week.
The Giants can trade the rights to four 17-year-olds over the next two seasons, with midfielders O'Meara and Brad Crouch the most highly sought this year ahead of Thursday's 5pm AEDT deadline.
AFL rules stipulate that GWS cannot retain the 17-year-old players, but the Giants are reported to be exploring a loophole with three other clubs - Hawthorn, Adelaide and Fremantle - that would see them secure O'Meara.
Kerr said the deal, which could potentially see the rights to O'Meara traded out then returned to GWS via a third club, had prevented other deals from taking place on day two of Trade Week.
He also said the Lions had not been involved in those discussions and weren't aware what role they would play in any deal with Fremantle for Clark.
"There's been a bit happening behind the scenes and that's probably tied Fremantle up over the last 24 hours," Kerr told afl.com.au's Trade Week Radio.
"We haven't heard anything further than where we were yesterday.
"I think what's happening is the 17-year-old mini draft is obviously occupying the minds of a lot of clubs at the moment and I'm getting the impression that a lot of other things are getting held up until those trades are resolved.
"I'm expecting that there might be a bit more movement once we get past that point."
Discussions between Fremantle and the Lions on Clark were at a stalemate on day two of Trade Week, with Fremantle yet to offer its first pick (No.16) at the 2011 NAB AFL Draft.
Kerr said that ideally the Lions would be after a better draft pick in exchange for a player that he said, "every club would like to have on their list".
Adelaide, which is involved in the four-way discussions around O'Meara, holds pick No.10 in this year's draft.
There is a suggestion that the Crows would like to enter the mini-draft to secure South Australian teenager Ben Kennedy.
Kerr said if Fremantle could acquire pick No.10 in those discussions and were prepared to offer it in exchange for Clark, that would be a "fair advance" in negotiations.
"At least at that point you're starting to have a think about it," he said. "They haven't even put pick 16 on the table."
No trades are official until paperwork has been accepted by the AFL and formally recognised after 2pm on Monday, October 17.
Follow our complete coverage of the 2011 AFL exchange period from October 10-17. Join the AFL trade conversation on Twitter: use #tradeweek in your tweets
